Re-factor Ash Message Center code part 2/4

ash/system/web_notification/web_notification_tray.h

Index: ash/system/web_notification/web_notification_tray.h
diff --git a/ash/system/web_notification/web_notification_tray.h b/ash/system/web_notification/web_notification_tray.h
index 3aa6fa643def8006d69a6bfe29fc62e6dc8912fb..64d2affd20b4f15dfa5a73255d932fae96d32891 100644
--- a/ash/system/web_notification/web_notification_tray.h
+++ b/ash/system/web_notification/web_notification_tray.h
@@ -124,6 +124,8 @@ class ASH_EXPORT WebNotificationTray : public internal::TrayBackgroundView,
   virtual void SetShelfAlignment(ShelfAlignment alignment) OVERRIDE;
   virtual void AnchorUpdated() OVERRIDE;
   virtual string16 GetAccessibleName() OVERRIDE;
+  virtual void HideBubbleWithView(const TrayBubbleView* bubble_view) OVERRIDE;
+  virtual bool ClickedOutsideBubble() OVERRIDE;
 
   // Overridden from internal::ActionableView.
   virtual bool PerformAction(const ui::Event& event) OVERRIDE;
@@ -187,9 +189,6 @@ class ASH_EXPORT WebNotificationTray : public internal::TrayBackgroundView,
   // As above but also updates any visible bubble.
   void UpdateTrayAndBubble();
 
-  // Hides the specified bubble (called when |bubble| is closed from Views).
-  void HideBubble(message_center::WebNotificationBubble* bubble);
-
   // Testing accessors.
   size_t GetNotificationCountForTest() const;
   bool HasNotificationForTest(const std::string& id) const;