Chrome Version: ToT (79e1a976180ae82598448329db910238d31a7635)

What steps will reproduce the problem?
(1) Build a release build on macOS 10.12

What is the expected result?
No warnings.

What happens instead?
[8926/11984] CXX obj/third_party/WebKi...controls/MediaControlsResourceLoader.o
../../third_party/WebKit/Source/modules/media_controls/MediaControlsResourceLoader.cpp:59:24: warning: pragma diagnostic pop could not pop, no matching push [-Wunknown-pragmas]
#pragma GCC diagnostic pop
                       ^
1 warning generated.

beccahughes@, could you fix or triage?