GitLab

Completes a TODO added in r149891.

BUG=None
TEST=open panels and verify favicons look correct


Review URL: https://chromiumcodereview.appspot.com/10827259

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151668 0039d316-1c4b-4281-b951-d872f2087c98