Revert 228293 "Redesign of the avatar menu button."

Crashing in the wild, per crbug.com/307111.

> Redesign of the avatar menu button.
> 
> Screenshots: https://drive.google.com/folderview?id=0B1B1Up4p2NRMYm8zRzFhQkpCTUE&usp=sharing
> This is behind the --new-profile-management flag, and shows the avatar
> switcher as a menu button in the caption area. The button shows the user's
> name, rather than an image.
> 
> Caveats:
> -- The resources needed by the buttons are in CL: <insert here>
> -- Currently this works on Aero and themed windows. Haven't tested on Win8/Metro,
> but I'm suspicious it does nothing.
> 
> BUG=287883
> 
> Review URL: https://codereview.chromium.org/24647003

TBR=noms@chromium.org
BUG=287883, 307111

Review URL: https://codereview.chromium.org/26931007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228504 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228504