Move stored password hash to profile-info-cache.

The password hash was being saved as part of a user's profile but it needs to be in the "info cache" so it can be checked via the user-manager screen without having to load individual profiles.

BUG=324060

Review URL: https://codereview.chromium.org/100153002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238813 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238813