Remove "request access" button in managed user block page if Sync is unauthenticated for a managed user.

Also, change the message displayed in that case.

BUG=268930

Review URL: https://chromiumcodereview.appspot.com/22594006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@216535 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed