Revert 260630 "Just some cleanup before I start on the profile n..."
Causing compile failure
> Just some cleanup before I start on the profile name fix.
> Make GAIAInfoUpdateService listen to signin manager and use its api instead
> of directly accessing the username pref.
>
> BUG=351970
>
> Review URL: https://codereview.chromium.org/
196243009
TBR=rogerta@chromium.org
Review URL: https://codereview.chromium.org/
219983002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@260642 0039d316-1c4b-4281-b951-d872f2087c98