
Add DCHECK()s or conditionals as appropriate to callers in order to ensure this assertion holds. BUG=none TEST=none Review URL: http://codereview.chromium.org/8418034 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112005 0039d316-1c4b-4281-b951-d872f2087c98