UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36

Steps to reproduce the problem:
ninja -C out/gn chrome

What is the expected behavior?
success

What went wrong?
../../chrome/browser/ui/cocoa/fullscreen/fullscreen_toolbar_mouse_tracker.mm:78:24: error: 'window' is deprecated: first deprecated in macOS 10.6 [-Werror,-Wdeprecated-declarations]
  contentView_ = [[bwc window] contentView];
                       ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSCachedImageRep.h:28:1: note: 'window' has been explicitly marked deprecated here
- (NSWindow *)window NS_DEPRECATED_MAC(10_0, 10_6);

i got this message and ninja fail to build chromium.

Did this work before? N/A 

Chrome version: 54.0.2840.71  Channel: n/a
OS Version: OS X 10.12.1
Flash Version: Shockwave Flash 23.0 r0