Fix the notification center label.

ui/message_center/views/message_center_view.cc

 // Copyright (c) 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.
 
 #include "ui/message_center/views/message_center_view.h"
 
 #include <list>
 #include <map>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 978 matching lines @@
   scroller_->SetFocusable(!no_message_views);
 
   if (focus_manager && focused_view)
     focus_manager->SetFocusedView(focused_view);
 
   scroller_->InvalidateLayout();
   PreferredSizeChanged();
   Layout();
 }
 
+void MessageCenterView::SetNotificationTitle(const base::string16& new_title) {
+  button_bar_->SetNotificationTitle(new_title);
+}
+
 void MessageCenterView::SetNotificationViewForTest(MessageView* view) {
   message_list_view_->AddNotificationAt(view, 0);
 }
 
 }  // namespace message_center