Revert 250967 "Revert of [sync]: add ManagedUserSigninManagerWra..."

> Revert of [sync]: add ManagedUserSigninManagerWrapper and pass to ProfileSyncService (https://codereview.chromium.org/137753012/)
> 
> Reason for revert:
> Possible build bustage on Win64.
> 
> Original issue's description:
> > [sync]: add ManagedUserSigninManagerWrapper and pass to ProfileSyncService
> > 
> > BUG=80194
> > 
> > Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=250814
> 
> TBR=bauerb@chromium.org,rogerta@chromium.org,pavely@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=80194
> 
> Review URL: https://codereview.chromium.org/162943002

TBR=tim@chromium.org

Review URL: https://codereview.chromium.org/163983005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251114 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251114