UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36

Steps to reproduce the problem:
compile.

What is the expected behavior?
Compile success

What went wrong?
Compile failed with this message
../../ui/views/cocoa/bridged_content_view_touch_bar.mm:50:4: error: 'NSTouchBarItem' is partial: introduced in macOS 10.12.1 [-Werror,-Wunguarded-availability

Did this work before? N/A 

Chrome version:   Channel: canary
OS Version: OS X 10.12.1
Flash Version: Shockwave Flash 23.0 r0