Treat some failure results as a success when doing on-line auth.

BUG=337823

Review URL: https://codereview.chromium.org/148983002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248220 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248220