GitLab

This reverts changes user_manager_impl.cc that were lost in previous
revert (https://codereview.chromium.org/284333002) because file got moved.

BUG=331530
TBR=antrim

Review URL: https://codereview.chromium.org/288923010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270974 0039d316-1c4b-4281-b951-d872f2087c98