This was previously approved at https://codereview.chromium.org/15875020/

BUG=245318
TBR=cpu

Review URL: https://codereview.chromium.org/16380002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204052 0039d316-1c4b-4281-b951-d872f2087c98