Fixing problem with user image in settings page when page gets called as visiting window on a multi profile desktop

In Multi profile scenarios, a window can visit another users desktop and as such using the current user is incorrect. Instead the user from the current browser's profile should be taken to determine the user image.

BUG=315078
TEST=visual

Review URL: https://codereview.chromium.org/60443002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233225 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233225