Add strings for gaia captcha and sync/extensions malfunction messaging.

BUG=19738,26499

Review URL: http://codereview.chromium.org/371037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@31334 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed