Revert 232714 "suppress data race on media::CoreAudioUtil"

> suppress data race on media::CoreAudioUtil
> BUG=314654
> TBR=ygorshenin@chromium.org
> TEST=waterfall
> 
> Review URL: https://codereview.chromium.org/57643003

TBR=zhaoqin@google.com
BUG=314654

Review URL: https://codereview.chromium.org/163253003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250977 0039d316-1c4b-4281-b951-d872f2087c98