New avatar button: Update when the supervised user ID changes.

chrome/browser/profiles/profile_info_cache.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/profiles/profile_info_cache.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/i18n/case_conversion.h"
 #include "base/logging.h"
@@ skipping 536 matching lines @@
 void ProfileInfoCache::SetSupervisedUserIdOfProfileAtIndex(
     size_t index,
     const std::string& id) {
   if (GetSupervisedUserIdOfProfileAtIndex(index) == id)
     return;
   scoped_ptr<base::DictionaryValue> info(
       GetInfoForProfileAtIndex(index)->DeepCopy());
   info->SetString(kSupervisedUserId, id);
   // This takes ownership of |info|.
   SetInfoForProfileAtIndex(index, info.release());
+
+  base::FilePath profile_path = GetPathOfProfileAtIndex(index);
+  FOR_EACH_OBSERVER(ProfileInfoCacheObserver,
+                    observer_list_,
+                    OnProfileSupervisedUserIdChanged(profile_path));
 }
 
 void ProfileInfoCache::SetLocalAuthCredentialsOfProfileAtIndex(
     size_t index,
     const std::string& credentials) {
   scoped_ptr<base::DictionaryValue> info(
       GetInfoForProfileAtIndex(index)->DeepCopy());
   info->SetString(kAuthCredentialsKey, credentials);
   // This takes ownership of |info|.
   SetInfoForProfileAtIndex(index, info.release());
@@ skipping 438 matching lines @@
                     OnProfileAvatarChanged(profile_path));
 
   // Remove the file from the list of downloads in progress. Note that this list
   // only contains the high resolution avatars, and not the Gaia profile images.
   if (!avatar_images_downloads_in_progress_[file_name])
     return;
 
   delete avatar_images_downloads_in_progress_[file_name];
   avatar_images_downloads_in_progress_[file_name] = NULL;
 }