[Mac] Implement the avatar menu bubble.

chrome/browser/profiles/avatar_menu_model.cc

 // Copyright (c) 2011 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/avatar_menu_model.h"
 
 #include "base/stl_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/avatar_menu_model_observer.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 85 matching lines @@
 const AvatarMenuModel::Item& AvatarMenuModel::GetItemAt(size_t index) {
   DCHECK_LT(index, items_.size());
   return *items_[index];
 }
 
 void AvatarMenuModel::Observe(int type,
                               const NotificationSource& source,
                               const NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED, type);
   RebuildMenu();
+  observer_->OnAvatarMenuModelChanged(this);
 }
 
 void AvatarMenuModel::RebuildMenu() {
   ClearMenu();
 
   const size_t count = profile_info_->GetNumberOfProfiles();
   for (size_t i = 0; i < count; ++i) {
     Item* item = new Item(i, profile_info_->GetAvatarIconOfProfileAtIndex(i));
     item->name = profile_info_->GetNameOfProfileAtIndex(i);
     if (browser_) {
       FilePath path = profile_info_->GetPathOfProfileAtIndex(i);
       item->active = browser_->profile()->GetPath() == path;
     }
     items_.push_back(item);
   }
-
-  observer_->OnAvatarMenuModelChanged(this);
 }
 
 void AvatarMenuModel::ClearMenu() {
   STLDeleteContainerPointers(items_.begin(), items_.end());
   items_.clear();
 }