Update macOS build to version 53

Spinoff of this comment
@9Morello: Looks like your situation is similar to this. Have you seen something similar to the following in your build output?:
Warning: You are using OS X 10.12.
We do not provide support for this pre-release version.
You may encounter build failures or other breakages.
Please create pull-requests instead of filing issues.

Warning: Your Xcode (7.3.1) is outdated
Please update to Xcode 8.0.
Xcode can be updated from
  https://developer.apple.com/xcode/downloads/

Warning: Your Homebrew is outdated.
You haven't updated for at least 24 hours. This is a long time in brewland!
To update Homebrew, run `brew update`.

No, I didn't get a similar output running brew doctor. I'm still on El Capitan (10.11.6). It seems there aren't many clues on brew doctor:
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry and just ignore them. Thanks!

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
    /usr/local/lib/libc++abi.dylib
    /usr/local/lib/libcurl.4.dylib

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected header files:
    /usr/local/include/curl/curl.h
    /usr/local/include/curl/curlbuild.h
    /usr/local/include/curl/curlrules.h
    /usr/local/include/curl/curlver.h
    /usr/local/include/curl/easy.h
    /usr/local/include/curl/mprintf.h
    /usr/local/include/curl/multi.h
    /usr/local/include/curl/stdcheaders.h
    /usr/local/include/curl/typecheck-gcc.h

Warning: Unbrewed .la files were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected .la files:
    /usr/local/lib/libcurl.la

Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected .pc files:
    /usr/local/lib/pkgconfig/libcurl.pc

Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected static libraries:
    /usr/local/lib/libcurl.a

Anyway, I just ran brew update, brew upgrade and started from scratch. It got a bit further. Also, it seems it restarted despite failing building some files.
[2963/20047] OBJC obj/third_party/goog...it/google_toolbox_for_mac.GTMIBArray.o
FAILED: obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMIBArray.o
/usr/local/Cellar/llvm/3.8.1/bin/clang -MMD -MF obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMIBArray.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DUSE_LIBPCI=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -I../../third_party/google_toolbox_for_mac -I../../third_party/google_toolbox_for_mac/src -I../../third_party/google_toolbox_for_mac/src/AppKit -I../../third_party/google_toolbox_for_mac/src/DebugUtils -I../../third_party/google_toolbox_for_mac/src/Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-unused-variable -std=c99 -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis  -c ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m -o obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMIBArray.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMIBArray.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2964/20047] OBJC obj/third_party/goog...toolbox_for_mac.GTMKeyValueAnimation.o
FAILED: obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMKeyValueAnimation.o
/usr/local/Cellar/llvm/3.8.1/bin/clang -MMD -MF obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMKeyValueAnimation.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DUSE_LIBPCI=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -I../../third_party/google_toolbox_for_mac -I../../third_party/google_toolbox_for_mac/src -I../../third_party/google_toolbox_for_mac/src/AppKit -I../../third_party/google_toolbox_for_mac/src/DebugUtils -I../../third_party/google_toolbox_for_mac/src/Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-unused-variable -std=c99 -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis  -c ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m -o obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMKeyValueAnimation.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMKeyValueAnimation.h:18:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2965/20047] OBJC obj/third_party/goog...r_mac.GTMFadeTruncatingTextFieldCell.o
FAILED: obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMFadeTruncatingTextFieldCell.o
/usr/local/Cellar/llvm/3.8.1/bin/clang -MMD -MF obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMFadeTruncatingTextFieldCell.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DUSE_LIBPCI=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -I../../third_party/google_toolbox_for_mac -I../../third_party/google_toolbox_for_mac/src -I../../third_party/google_toolbox_for_mac/src/AppKit -I../../third_party/google_toolbox_for_mac/src/DebugUtils -I../../third_party/google_toolbox_for_mac/src/Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-unused-variable -std=c99 -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis  -c ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m -o obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMFadeTruncatingTextFieldCell.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.m:18:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMFadeTruncatingTextFieldCell.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2966/20047] OBJC obj/third_party/goog...lbox_for_mac.GTMNSAnimation+Duration.o
FAILED: obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMNSAnimation+Duration.o
/usr/local/Cellar/llvm/3.8.1/bin/clang -MMD -MF obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMNSAnimation+Duration.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DUSE_LIBPCI=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -I../../third_party/google_toolbox_for_mac -I../../third_party/google_toolbox_for_mac/src -I../../third_party/google_toolbox_for_mac/src/AppKit -I../../third_party/google_toolbox_for_mac/src/DebugUtils -I../../third_party/google_toolbox_for_mac/src/Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-unused-variable -std=c99 -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis  -c ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m -o obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMNSAnimation+Duration.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSAnimation+Duration.h:20:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2967/20047] OBJC obj/third_party/goog...oogle_toolbox_for_mac.GTMCarbonEvent.o
FAILED: obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMCarbonEvent.o
/usr/local/Cellar/llvm/3.8.1/bin/clang -MMD -MF obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMCarbonEvent.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DUSE_LIBPCI=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -I../../third_party/google_toolbox_for_mac -I../../third_party/google_toolbox_for_mac/src -I../../third_party/google_toolbox_for_mac/src/AppKit -I../../third_party/google_toolbox_for_mac/src/DebugUtils -I../../third_party/google_toolbox_for_mac/src/Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-unused-variable -std=c99 -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis  -c ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m -o obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMCarbonEvent.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.m:19:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMCarbonEvent.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2968/20047] OBJC obj/third_party/goog...olbox_for_mac.GTMNSBezierPath+CGPath.o
FAILED: obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMNSBezierPath+CGPath.o
/usr/local/Cellar/llvm/3.8.1/bin/clang -MMD -MF obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMNSBezierPath+CGPath.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DUSE_LIBPCI=1 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -Igen -I../../third_party/google_toolbox_for_mac -I../../third_party/google_toolbox_for_mac/src -I../../third_party/google_toolbox_for_mac/src/AppKit -I../../third_party/google_toolbox_for_mac/src/DebugUtils -I../../third_party/google_toolbox_for_mac/src/Foundation -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-unused-variable -std=c99 -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis  -c ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m -o obj/third_party/google_toolbox_for_mac/src/AppKit/google_toolbox_for_mac.GTMNSBezierPath+CGPath.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.m:20:
In file included from ../../third_party/google_toolbox_for_mac/src/AppKit/GTMNSBezierPath+CGPath.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2969/20047] CXX obj/third_party/harfbuzz-ng/src/harfbuzz-ng.hb-coretext.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
[2970/20047] CXX obj/third_party/harfb...z-ng.hb-ot-shape-complex-indic-table.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
[2971/20047] CXX obj/third_party/harfbuzz-ng/src/harfbuzz-ng.hb-ot-layout.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
[2972/20047] CC obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
ninja: build stopped: subcommand failed.
2016-09-17 17:12:17,820 - ERROR: ninja returned non-zero exit code: 1

The Xcode you updated to is 8.0, right?
The files in the error messages reside in /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk. Do you have a MacOSX10.11.sdk directory or something similar?

I don't, and I'm not sure it should have. The MacOSX10.12.sdk folder is just a link to the MacOSX.sdk folder.
I also have a MacOSX10.6.sdk folder that I installed for something else.

I checked the Chromium instructions, and they don't say anything about Xcode 8. The latest instructions say it supports "7.3+", but nothing about 8.0. The instructions for the version we're building with say "5+", but I think Google's build bots are running 7 already. I also tried Google searching, and I haven't seen anyone post issues with Xcode 8.0 and Chromium.
I guess we're entering uncharted territory.

I got 10.11's SDK from here and added to the Xcode folder. Its compiling, lets see what happens.

I'm not understanding how you installed the 10.11 SDK. Do you just drop the directory into that path? Are there some commands you run to set the default SDK? I'm wondering how Chromium knows which SDK to choose...
I made that commit earlier hoping that Xcode 8.0's clang compiler included with the 10.12 SDK would be able to build Chromium without a hitch. I believe we've tried to build Chromium with the 10.11 SDK to no avail...

I just copied the downloaded MacOSX10.11.sdk folder to the same place where MacOSX10.12.sdk is.
Its compiling just fine so far. hahaa

Was there any change related to bluetooth and Macs in this version of Chromium?

Seems like it. I inspected my build outputs on Debian, and it seems I'm using libstdc++ (GNU's implementation of the standard library), whereas you're using libc++ (LLVM"s implementation of the standard library). We're both using Clang 3.8, but I guess the Chromium code changes don't like your version of libc++
Could you pull in the commit to use Xcode's clang and try re-building? I want to avoid using Homebrew's LLVM altogether.

Got an error:
[1382/20047] CXX obj/printing/backend/printing.print_backend_cups.o
FAILED: obj/printing/backend/printing.print_backend_cups.o
c++ -MMD -MF obj/printing/backend/printing.print_backend_cups.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DPRINTING_IMPLEMENTATION -DPRINT_BACKEND_AVAILABLE -DSK_SUPPORT_GPU=1 -DSK_IGNORE_DW_GRAY_FIX -DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_NOEXCEPT= -DU_STATIC_IMPLEMENTATION -DUSE_CUPS -DUSE_LIBPCI=1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -D_FORTIFY_SOURCE=2 -Igen -I../.. -I../../skia/config -I../../third_party/skia/include/core -I../../third_party/skia/include/effects -I../../third_party/skia/include/pdf -I../../third_party/skia/include/gpu -I../../third_party/skia/include/lazy -I../../third_party/skia/include/pathops -I../../third_party/skia/include/pipe -I../../third_party/skia/include/ports -I../../third_party/skia/include/utils -I../../third_party/skia/include/utils/mac -I../../skia/ext -I../../third_party/icu/source/i18n -I../../third_party/icu/source/common -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -std=c++11 -stdlib=libc++ -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -fno-threadsafe-statics -fcolor-diagnostics -fno-strict-aliasing  -c ../../printing/backend/print_backend_cups.cc -o obj/printing/backend/printing.print_backend_cups.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
../../printing/backend/print_backend_cups.cc:243:21: error: use of undeclared identifier 'cupsGetPPD'
    ppd_file_path = cupsGetPPD(name);
                    ^
../../printing/backend/print_backend_cups.cc:256:21: error: use of undeclared identifier 'cupsGetPPD2'
    ppd_file_path = cupsGetPPD2(http.http(), name);
                    ^
2 warnings and 2 errors generated.

Got another error related to bluetooth.
[5543/18659] OBJCXX obj/device/bluetoo...th.bluetooth_remote_gatt_service_mac.o
FAILED: obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o
c++ -MMD -MF obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DDEVICE_BLUETOOTH_IMPLEMENTATION -DSK_SUPPORT_GPU=1 -DSK_IGNORE_DW_GRAY_FIX -DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_NOEXCEPT= -DU_STATIC_IMPLEMENTATION -DUSE_LIBPCI=1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -D_FORTIFY_SOURCE=2 -Igen -I../.. -I../../skia/config -I../../third_party/boringssl/src/include -I../../third_party/skia/include/core -I../../third_party/skia/include/effects -I../../third_party/skia/include/pdf -I../../third_party/skia/include/gpu -I../../third_party/skia/include/lazy -I../../third_party/skia/include/pathops -I../../third_party/skia/include/pipe -I../../third_party/skia/include/ports -I../../third_party/skia/include/utils -I../../third_party/skia/include/utils/mac -I../../skia/ext -I../../third_party/icu/source/i18n -I../../third_party/icu/source/common -Igen/device/bluetooth/strings -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -std=c++11 -stdlib=libc++ -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -fno-threadsafe-statics -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis -fobjc-call-cxx-cdtors  -c ../../device/bluetooth/bluetooth_remote_gatt_service_mac.mm -o obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../device/bluetooth/bluetooth_remote_gatt_service_mac.mm:5:
In file included from ../../device/bluetooth/bluetooth_remote_gatt_service_mac.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/vector:265:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__bit_reference:15:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/algorithm:628:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:1740:31: error: call to implicitly-deleted copy constructor of 'std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >'
            ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...);
                              ^   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:1656:18: note: in instantiation of function template specialization 'std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, void *> >::construct<std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, const std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > &>' requested here
            {__a.construct(__p, _VSTD::forward<_Args>(__args)...);}
                 ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:1502:14: note: in instantiation of function template specialization 'std::__1::allocator_traits<std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, void *> > >::__construct<std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, const std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > &>' requested here
            {__construct(__has_construct<allocator_type, _Tp*, _Args...>(),
             ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:2276:20: note: in instantiation of function template specialization 'std::__1::allocator_traits<std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, void *> > >::construct<std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, const std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > &>' requested here
    __node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_),
                   ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:1998:29: note: in instantiation of function template specialization 'std::__1::__hash_table<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::__unordered_map_hasher<std::__1::basic_string<char>, std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::hash<std::__1::basic_string<char> >, true>, std::__1::__unordered_map_equal<std::__1::basic_string<char>, std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::equal_to<std::__1::basic_string<char> >, true>, std::__1::allocator<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > > >::__construct_node_hash<const std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > &>' requested here
        __node_holder __h = __construct_node_hash(__hash, _VSTD::forward<_Args>(__args)...);
                            ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:1144:16: note: in instantiation of function template specialization 'std::__1::__hash_table<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::__unordered_map_hasher<std::__1::basic_string<char>, std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::hash<std::__1::basic_string<char> >, true>, std::__1::__unordered_map_equal<std::__1::basic_string<char>, std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::equal_to<std::__1::basic_string<char> >, true>, std::__1::allocator<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > > >::__emplace_unique_key_args<std::__1::basic_string<char>, const std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > &>' requested here
        return __emplace_unique_key_args(_NodeTypes::__get_key(__x), __x);
               ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_map:934:26: note: in instantiation of member function 'std::__1::__hash_table<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::__unordered_map_hasher<std::__1::basic_string<char>, std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::hash<std::__1::basic_string<char> >, true>, std::__1::__unordered_map_equal<std::__1::basic_string<char>, std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >, std::__1::equal_to<std::__1::basic_string<char> >, true>, std::__1::allocator<std::__1::__hash_value_type<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > > >::__insert_unique' requested here
        {return __table_.__insert_unique(__x);}
                         ^
../../device/bluetooth/bluetooth_remote_gatt_service_mac.mm:103:50: note: in instantiation of member function 'std::__1::unordered_map<std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> >, std::__1::hash<std::__1::basic_string<char> >, std::__1::equal_to<std::__1::basic_string<char> >, std::__1::allocator<std::__1::pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > > > >::insert' requested here
    auto result_iter = gatt_characteristic_macs_.insert(
                                                 ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/utility:288:5: note: explicitly defaulted function was implicitly deleted here
    pair(const pair& __p) = default;
    ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/utility:259:9: note: copy constructor of 'pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >' is implicitly deleted because field 'second' has a deleted copy constructor
    _T2 second;
        ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2609:31: note: copy constructor is implicitly deleted because 'unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> >' has a user-declared move constructor
    _LIBCPP_INLINE_VISIBILITY unique_ptr(unique_ptr&& __u) _NOEXCEPT
                              ^
2 warnings and 1 error generated.
[5544/18659] CXX obj/device/bluetooth/device_bluetooth.bluetooth_socket_net.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
[5545/18659] OBJCXX obj/device/bluetoo...tooth_remote_gatt_characteristic_mac.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
[5546/18659] OBJCXX obj/device/bluetoo...evice_bluetooth.bluetooth_socket_mac.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
2 warnings generated.
[5552/18659] ACTION Generating about:credits
ninja: build stopped: subcommand failed.
2016-09-18 21:41:29,944 - ERROR: ninja returned non-zero exit code: 1

This error is really interesting, since it's the same file on the same line causing an error, but it's a different error this time :/
In build/common.gypi, line 5264 (or somewhere around there), could you change 'CLANG_CXX_LIBRARY': 'libc++', to have libstdc++ instead of libc++? This may be a terrible idea, but so far libc++ is not getting us anywhere with Homebrew's or Xcode's versions of them.

I done what you said and got an error in /skia/ext/skia_histogram.h (and a bunch of other files) saying it couldn't find the cstdint header. Changing it to cstdint.h made it start compiling again, but I got the same error with another header:
In file included from ../../third_party/zlib/google/compression_utils.cc:13:
../../base/bit_cast.h:9:10: fatal error: 'type_traits' file not found
#include <type_traits>

Changing this to type_traits.h didn't make it work. I've tried a few values for std (c++0x, c++11, etc.) and stdlib (libc++, libstdc++), but got the same result.

Relevant information: I tried to build it with homebrew's clang... and got the same error. Doesn't seem to be a problem with Xcode.
[5005/14906] OBJCXX obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o
FAILED: obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o
/usr/local/Cellar/llvm/3.8.1/bin/clang++ -MMD -MF obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DDEVICE_BLUETOOTH_IMPLEMENTATION -DSK_SUPPORT_GPU=1 -DSK_IGNORE_DW_GRAY_FIX -DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_NOEXCEPT= -DU_STATIC_IMPLEMENTATION -DUSE_LIBPCI=1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -D_FORTIFY_SOURCE=2 -Igen -I../.. -I../../skia/config -I../../third_party/boringssl/src/include -I../../third_party/skia/include/core -I../../third_party/skia/include/effects -I../../third_party/skia/include/pdf -I../../third_party/skia/include/gpu -I../../third_party/skia/include/lazy -I../../third_party/skia/include/pathops -I../../third_party/skia/include/pipe -I../../third_party/skia/include/ports -I../../third_party/skia/include/utils -I../../third_party/skia/include/utils/mac -I../../skia/ext -I../../third_party/icu/source/i18n -I../../third_party/icu/source/common -Igen/device/bluetooth/strings -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -std=c++11 -stdlib=libc++ -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -fno-threadsafe-statics -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis -fobjc-call-cxx-cdtors  -c ../../device/bluetooth/bluetooth_remote_gatt_service_mac.mm -o obj/device/bluetooth/device_bluetooth.bluetooth_remote_gatt_service_mac.o
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../device/bluetooth/bluetooth_remote_gatt_service_mac.mm:5:
In file included from ../../device/bluetooth/bluetooth_remote_gatt_service_mac.h:12:
In file included from ../../base/containers/scoped_ptr_hash_map.h:14:
In file included from ../../base/containers/hash_tables.h:9:
/usr/local/Cellar/llvm/3.8.1/bin/../include/c++/v1/unordered_map:605:11: error: call to implicitly-deleted copy constructor of 'value_type' (aka 'pair<const std::__1::basic_string<char>, std::__1::unique_ptr<device::BluetoothRemoteGattCharacteristicMac, std::__1::default_delete<device::BluetoothRemoteGattCharacteristicMac> > >')

That being said, I had to switch to the OSX 10.11's SDK, as I was getting these errors with 10.12:
[13/18710] OBJCXX obj/third_party/WebKit/Source/build/mac/webcore_remaining.Prefix.h-mm.gch
FAILED: obj/third_party/WebKit/Source/build/mac/webcore_remaining.Prefix.h-mm.gch
/usr/local/Cellar/llvm/3.8.1/bin/clang++ -MMD -MF obj/third_party/WebKit/Source/build/mac/webcore_remaining.Prefix.h-mm.gch.d -DV8_DEPRECATION_WARNINGS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0 -DDISABLE_NACL -DCHROMIUM_BUILD -DCR_CLANG_REVISION=274142-1 -DUSE_LIBJPEG_TURBO=1 -DENABLE_MEDIA_ROUTER=1 -DUSE_PROPRIETARY_CODECS -DENABLE_PEPPER_CDMS -DENABLE_NOTIFICATIONS -DUSE_EXTERNAL_POPUP_MENU -DTRACING_IS_OFFICIAL_BUILD=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PDF=1 -DENABLE_PLUGIN_INSTALLATION=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_PRINTING=1 -DENABLE_BASIC_PRINTING=1 -DENABLE_PRINT_PREVIEW=1 -DENABLE_SPELLCHECK=1 -DUSE_BROWSER_SPELLCHECKER=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_SUPERVISED_USERS=1 -DENABLE_SERVICE_DISCOVERY=1 -DV8_USE_EXTERNAL_STARTUP_DATA -DBLINK_IMPLEMENTATION=1 -DINSIDE_BLINK -DENABLE_LAYOUT_UNIT_IN_INLINE_BOXES=0 -DENABLE_OILPAN=1 -DWTF_USE_CONCATENATED_IMPULSE_RESPONSES=1 -DWTF_USE_ICCJPEG=1 -DWTF_USE_QCMSLIB=1 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_NOEXCEPT= -DU_STATIC_IMPLEMENTATION -DSK_SUPPORT_GPU=1 -DSK_IGNORE_DW_GRAY_FIX -DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS -DLIBXML_STATIC -DLIBXSLT_STATIC -DUSE_LIBPCI=1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -D_FORTIFY_SOURCE=2 -Igen -I../.. -I../../skia/config -I../../third_party/WebKit/Source -I../../third_party/khronos -I../../gpu -Igen/angle -Igen/blink -I../../third_party/angle/include -I../../third_party/icu/source/i18n -I../../third_party/icu/source/common -I../../third_party/WebKit -Igen/third_party/WebKit -I../../third_party/skia/include/core -I../../third_party/skia/include/effects -I../../third_party/skia/include/pdf -I../../third_party/skia/include/gpu -I../../third_party/skia/include/lazy -I../../third_party/skia/include/pathops -I../../third_party/skia/include/pipe -I../../third_party/skia/include/ports -I../../third_party/skia/include/utils -I../../third_party/skia/include/utils/mac -I../../skia/ext -I../../third_party/iccjpeg -I../../third_party/libpng -I../../third_party/libwebp -I../../third_party/libxml/mac/include -I../../third_party/libxml/src/include -I../../third_party/libxslt -I../../third_party/ots/include -I../../third_party/qcms/src -I../../third_party/zlib -I../../v8/include -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -O2 -fvisibility=hidden -mmacosx-version-min=10.7 -arch x86_64 -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wno-selector-type-mismatch -Wpartial-availability -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-inconsistent-missing-override -Wno-shift-negative-value -Wno-undefined-var-template -Wno-nonportable-include-path -Wglobal-constructors -Wexit-time-destructors -std=c++11 -stdlib=libc++ -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -fno-threadsafe-statics -fcolor-diagnostics -fno-strict-aliasing -Wobjc-missing-property-synthesis -fobjc-call-cxx-cdtors -x objective-c++-header -c ../../third_party/WebKit/Source/build/mac/Prefix.h -o obj/third_party/WebKit/Source/build/mac/webcore_remaining.Prefix.h-mm.gch
warning: unknown warning option '-Wno-undefined-var-template'; did you mean '-Wno-undefined-internal'? [-Wunknown-warning-option]
warning: unknown warning option '-Wno-nonportable-include-path'; did you mean '-Wno-gnu-include-next'? [-Wunknown-warning-option]
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12: error: unknown property attribute 'class'
@property (class, readonly) BOOL supportsSecureCoding;
           ^
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:6:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:262:12: error: unknown property attribute 'class'
@property (class, readonly) const NSStringEncoding *availableStringEncodings;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:269:12: error: unknown property attribute 'class'
@property (class, readonly) NSStringEncoding defaultCStringEncoding;    // Should be rarely used
           ^
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:11:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSNotification.h:45:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSNotificationCenter *defaultCenter;
           ^
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:33:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSBundle *mainBundle;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:46:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allBundles;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:47:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSArray<NSBundle *> *allFrameworks;
           ^
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:7:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:46:12: error: unknown property attribute 'class'
@property (class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:60:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantFuture;
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSDate.h:61:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSDate *distantPast;
           ^
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:14:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:108:12: error: unknown property attribute 'class'
@property (class, readonly, copy) NSCalendar *currentCalendar;                                  // user's preferred calendar
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCalendar.h:109:12: error: unknown property attribute 'class'
@property (class, readonly, strong) NSCalendar *autoupdatingCurrentCalendar NS_AVAILABLE(10_5, 2_0); // tracks changes to user's preferred calendar identifier
           ^
In file included from ../../third_party/WebKit/Source/build/mac/Prefix.h:54:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:12:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:15:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:21:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *controlCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:22:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:23:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *whitespaceAndNewlineCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:24:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *decimalDigitCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:25:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *letterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:26:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *lowercaseLetterCharacterSet;
                     ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSCharacterSet.h:27:22: error: unknown property attribute 'class'
@property (readonly, class, copy) NSCharacterSet *uppercaseLetterCharacterSet;
                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.

What SDK does Google use?

Relevant information: I tried to build it with homebrew's clang... and got the same error. Doesn't seem to be a problem with Xcode.

In here, you got a different error with the same file. It looks like it trips up both LLVM 3.8 and Xcode.

What SDK does Google use?

They use their own LLVM version between 3.9 and 4.0 I believe. We might get past these errors if you use Homebrew to install the latest revision or use a specific revision that's new enough. If they made some modifications to LLVM, then we may be out of luck.
Also I did more research and switching to libstdc++ was a pretty bad idea. Apple doesn't seem to provide updates to that library anymore.

I tried getting a newer version of llvm, turns out the 8.0 has problems building it. haha Now I can't even install 3.8.
I'll look into downgrading Xcode to 7.3 again.

Unfortunately, it seems Xcode 8.0's CLT got released for Sierra only so far. Maybe an El Capitan version will appear next days.

Wow, that's frustrating. I wonder why they even bothered to release any Xcode 8.0 components for El Capitan if they're not all ready yet. There's no information on when the tools will be released, so we'd have to wait indefinitely.
If you want, you could try downgrading to 7.3 and use Homebrew's clang. Though I'm not sure if this will impact the errors we get with bluetooth_remote_gatt_service_mac.

Well, I've looked around and it seems some of my hardware doesn't support Sierra (yet). I was going to update but I guess I'm going to downgrade Xcode to 7.3.1 and try this again.
Anything I should look for before trying to compile?

Alright sounds good. If you get this to work, let me know where clang lives so I can update the GYP flags and buildlib accordingly. BTW, are you going to install LLVM from homebrew-core, or wait for homebrew-versions to update? I'm wondering if using the one from homebrew-core will remove the use of the version number in the path.

I'll probably install it from homebrew-core. I think using it from there removes the version number from the path.
I'm trying to compile with LLVM 3.9 directly downloaded from the official website. Seems to have gotten past the bluetooth error.
Before getting it to compile though, I was under the impression buildlib was ignoring my changes in the gyp_flags.
builder.setup_build_utilities()
builder.generate_build_configuration()
builder.build()

Leaving those 3 lines uncommented in build.py should be enough to make my changes in gyp_flags to work, right? It refused to, I had to delete the entire sandbox folder and restart from scratch to get it to change the flags.

generate_build_configuration() is what reads the GYP flags (gyp_flags files) and runs GYP. setup_build_utilities() doesn't actually do anything at the moment (it will build GN in the future). So you should be good to go.
I'm glad to hear that it got past the bluetooth error. Hopefully this is all that we needed to do...

Its working! There was a small error when building the .dmg, though.
2016-09-21 18:37:00,496 - INFO: Generating .dmg file...
mktemp -d /var/folders/jy/d01dhkjj3wq4k42p92kvd19m0000gn/T/tmpm24ourbj/pkg-dmg.60768.XXXXXXXX
/var/folders/jy/d01dhkjj3wq4k42p92kvd19m0000gn/T/tmpm24ourbj/pkg-dmg.60768.jYnUwe2u
mkdir /var/folders/jy/d01dhkjj3wq4k42p92kvd19m0000gn/T/tmpm24ourbj/pkg-dmg.60768.jYnUwe2u/stage
rsync -aC --include \*.so --copy-unsafe-links /var/empty/ /var/folders/jy/d01dhkjj3wq4k42p92kvd19m0000gn/T/tmpm24ourbj/pkg-dmg.60768.jYnUwe2u/stage
rsync -aC --include \*.so --copy-unsafe-links build/sandbox/out/Release/Chromium.app/ /var/folders/jy/d01dhkjj3wq4k42p92kvd19m0000gn/T/tmpm24ourbj/pkg-dmg.60768.jYnUwe2u/stage/Chromium.app
rsync: link_stat "/Volumes/Bakuya/ug_newbuild/ungoogled-chromium/build/build/sandbox/out/Release/Chromium.app/." failed: No such file or directory (2)
rsync error: some files could not be transferred (code 23) at /BuildRoot/Library/Caches/com.apple.xbs/Sources/rsync/rsync-47/rsync/main.c(992) [sender=2.6.9]
sandbox/chrome/installer/mac/pkg-dmg: copyFiles failed for method copy (cleaning up)
2016-09-21 18:37:00,689 - ERROR: pkg-dmg returned non-zero exit code

However, the most interesting part was the message I got when trying to run it:

Do you know what is it?
Otherwise, seems to be working as intended. I can search through Omnibox now (DDG as default - maybe Startpage is a more interesting option?), there is new tab page now, and I don't see any connection to Google domains.

f006c7c10e5e0becd1758574025fff206280e75a. Run generate_package() only to test package building.
I'm not sure what's causing the verification popup. Maybe because it's not installed in /Applications?

Hmm, I highly doubt so. I've tested version 51 the same way and didn't get this popup.
About the building precess... using LLVM 3.9 does not require any input from the user. You literally just download a zip, extract it and edit the flags to point to that folder. Perhaps its a good idea to include downloading LLVM 3.9 in this, instead of using Homebrew's?
Also, another question. How Chromium defines the locale of search engines? Ask's and Yahoo's searches point to my country's sub-domain.

Perhaps its a good idea to include downloading LLVM 3.9 in this, instead of using Homebrew's?

Sure. I'll look into implementing this.

Also, another question. How Chromium defines the locale of search engines? Ask's and Yahoo's searches point to my country's sub-domain.

Through files in multiple locations; see this patch for an example.

@Eloston Now it builds the damage, but puts the Chromium.app container inside a folder called Chromium.app.
It created a folder called Chromium.app, copied Chromium to it, and then moved the folder instead of the app to the .dmg file.

Now it builds the damage

I hadn't realized you hated dmgs that much ;)
a6253c69e8c0d46e4b835fc8512924ef6c6041d8. Now LLVM is exactly where Chromium expects it to be.

https://my.mixtape.moe/cioatb.dmg
I'll try to build it from scratch tomorrow to check if its working.
Also I can't help but think of damage when I read dmg hahaha

Actually I kind of want to resolve #42 before I upload a new version. But thanks for the build anyway.

The current version builds like a charm. Tried it from scratch and everything worked after running the script once. Here is the .dmg:
https://my.mixtape.moe/lzxjmu.dmg