Desktop user manager: Icons for supervised users.

chrome/browser/resources/user_manager/user_manager.css

 /* Copyright 2013 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* Overrides for the desktop user manager screen. */
 .oobe-display {
   background-color: #eee;
 }
 
@@ skipping 61 matching lines @@
   top: 10px;
   width: 35px;
   z-index: 1;
 }
 
 html[dir=rtl] .pod .locked-indicator {
   right: 10px;
 }
 
 .pod .supervised-indicator {
-  /* TODO(treib): Use round icon when it's available. */
-  background-image: url('chrome://theme/IDR_MANAGED_USER_ICON');
+  background-image: url('chrome://theme/IDR_ICON_PROFILES_SUPERVISED');
   background-repeat: no-repeat;
   height: 35px;
   left: 10px;
   position: absolute;
   top: 10px;
   width: 35px;
   z-index: 1;
 }
 
 html[dir=rtl] .pod .supervised-indicator {
   right: 10px;
 }