Fix mac build breakage on r245418

TBR=bbudge@chromium.org

Review URL: https://codereview.chromium.org/131493006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245419 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245419