Revision 59384 was incorrect and did not properly perform the check. This fixes it.

      BUG=55119
TEST=None

Review URL: http://codereview.chromium.org/3452004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@59558 0039d316-1c4b-4281-b951-d872f2087c98