Consolidate message observer API for win and aura (and touch).

chrome/browser/ui/views/notifications/balloon_view.h

 // 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.
 
 // Draws the view for the balloons.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_
 #pragma once
 
@@ skipping 34 matching lines @@
 // A balloon view is the UI component for a desktop notification toasts.
 // It draws a border, and within the border an HTML renderer.
 class BalloonViewImpl : public BalloonView,
                         public views::ViewMenuDelegate,
                         public views::WidgetDelegateView,
                         public views::ButtonListener,
                         public NotificationObserver,
                         public ui::AnimationDelegate {
  public:
   explicit BalloonViewImpl(BalloonCollection* collection);
-  ~BalloonViewImpl();
+  virtual ~BalloonViewImpl();
 
   // BalloonView interface.
   virtual void Show(Balloon* balloon) OVERRIDE;
   virtual void Update() OVERRIDE;
   virtual void RepositionToBalloon() OVERRIDE;
   virtual void Close(bool by_user) OVERRIDE;
   virtual gfx::Size GetSize() const OVERRIDE;
   virtual BalloonHost* GetHost() const OVERRIDE;
 
  private:
@@ skipping 95 matching lines @@
   scoped_ptr<NotificationOptionsMenuModel> options_menu_model_;
   scoped_ptr<views::Menu2> options_menu_menu_;
   views::MenuButton* options_menu_button_;
 
   NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonViewImpl);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_