Made notification center notifications collapsed and expandable.

ui/message_center/notifier_settings_view.h

 // 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.
 
 #ifndef UI_MESSAGE_CENTER_NOTIFIER_SETTINGS_VIEW_H_
 #define UI_MESSAGE_CENTER_NOTIFIER_SETTINGS_VIEW_H_
 
 #include <set>
 #include <string>
 
@@ skipping 26 matching lines @@
   void set_delegate(NotifierSettingsViewDelegate* new_delegate) {
     delegate_ = new_delegate;
   }
 
  private:
   class NotifierButton;
 
   NotifierSettingsView(NotifierSettingsViewDelegate* delegate);
   virtual ~NotifierSettingsView();
 
-  // views::WidgetDelegate overrides:
+  // Overridden from views::WidgetDelegate:
   virtual bool CanResize() const OVERRIDE;
   virtual string16 GetWindowTitle() const OVERRIDE;
   virtual void WindowClosing() OVERRIDE;
   virtual views::View* GetContentsView() OVERRIDE;
 
-  // views::ButtonListener overrides:
+  // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   NotifierSettingsViewDelegate* delegate_;
   std::set<NotifierButton*> buttons_;
 
   DISALLOW_COPY_AND_ASSIGN(NotifierSettingsView);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_NOTIFIER_SETTINGS_VIEW_H_