[Win,Linux] New avatar menu: Fix invisible "question mark" button.
crrev.com/272854 added a programmatic clip circle to the profile icon, which then also applied to the question mark button and the supervised user icon, effectively making them invisible. This CL adds a new container view above the profile icon which hosts the question mark and SU icon.
BUG=378256
Review URL: https://codereview.chromium.org/
315593003
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277304 0039d316-1c4b-4281-b951-d872f2087c98