Re-factor Ash Message Center code part 2/4

ash/system/web_notification/popup_bubble.h

 // 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.
 
 #ifndef ASH_SYSTEM_NOTIFICATION_POPUP_BUBBLE_H_
 #define ASH_SYSTEM_NOTIFICATION_POPUP_BUBBLE_H_
 
 #include "ash/system/web_notification/web_notification_bubble.h"
 #include "base/timer.h"
 
@@ skipping 10 matching lines @@
  public:
   explicit PopupBubble(WebNotificationTray* tray);
 
   virtual ~PopupBubble();
 
   size_t NumMessageViewsForTest() const;
 
   bool dirty() const { return dirty_; }
   void set_dirty(bool dirty) { dirty_ = dirty; }
 
-  // Overridden from TrayBubbleView::Host.
+  // Overridden from TrayBubbleView::Delegate.
   virtual void BubbleViewDestroyed() OVERRIDE;
-
   virtual void OnMouseEnteredView() OVERRIDE;
-
   virtual void OnMouseExitedView() OVERRIDE;
 
  private:
   // Overridden from WebNotificationBubble.
   virtual void UpdateBubbleView() OVERRIDE;
 
   void StartAutoCloseTimer();
 
   void StopAutoCloseTimer();
 
   void OnAutoClose();
 
   base::OneShotTimer<PopupBubble> autoclose_;
   PopupBubbleContentsView* contents_view_;
   size_t num_popups_;
   bool dirty_;
 
   DISALLOW_COPY_AND_ASSIGN(PopupBubble);
 };
 
 }  // namespace message_center
 
 }  // namespace ash
 
 #endif // ASH_SYSTEM_NOTIFICATION_POPUP_BUBBLE_H_