Replace Ash web notification tray view with a button.

ash/system/web_notification/web_notification_tray.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_WEB_NOTIFICATION_TRAY_H_
 #define ASH_SYSTEM_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/tray/tray_background_view.h"
 #include "ash/system/user/login_status.h"
 #include "base/gtest_prod_util.h"
 #include "ui/aura/event_filter.h"
 
 namespace aura {
 class LocatedEvent;
 }
 
 namespace gfx {
 class ImageSkia;
 }
 
 namespace views {
-class Label;
+class ImageButton;
 }
 
 namespace ash {
 
 namespace internal {
 class StatusAreaWidget;
 class WebNotificationButtonView;
 class WebNotificationList;
 class WebNotificationMenuModel;
 class WebNotificationView;
 }
 
 // Status area tray for showing browser and app notifications. The client
 // (e.g. Chrome) calls [Add|Remove|Update]Notification to create and update
 // notifications in the tray. It can also implement Delegate to receive
 // callbacks when a notification is removed (closed), clicked on, or a menu
 // item is triggered.
 //
 // Note: These are not related to system notifications (i.e NotificationView
 // generated by SystemTrayItem). Visibility of one notification type or other
 // is controlled by StatusAreaWidget.
 
-class ASH_EXPORT WebNotificationTray : public internal::TrayBackgroundView {
+class ASH_EXPORT WebNotificationTray : public internal::TrayBackgroundView,
+                                       public views::ButtonListener {
  public:
   class Delegate {
    public:
     virtual ~Delegate() {}
 
     // Called when the notification associated with |notification_id| is
     // removed (i.e. closed by the user).
     virtual void NotificationRemoved(const std::string& notifcation_id) = 0;
 
     // Request to disable the extension associated with |notification_id|.
@@ skipping 57 matching lines @@
   bool IsMouseInNotificationBubble() const;
 
   // Overridden from TrayBackgroundView.
   virtual void SetShelfAlignment(ShelfAlignment alignment) OVERRIDE;
   virtual void AnchorUpdated() OVERRIDE;
   virtual string16 GetAccessibleName() OVERRIDE;
 
   // Overridden from internal::ActionableView.
   virtual bool PerformAction(const ui::Event& event) OVERRIDE;
 
+  // Overridden from ButtonListener.
+  virtual void ButtonPressed(views::Button* sender,
+                             const ui::Event& event) OVERRIDE;
+
   // Constants exposed for unit tests:
   static const size_t kMaxVisibleTrayNotifications;
   static const size_t kMaxVisiblePopupNotifications;
 
  private:
   class Bubble;
   class MessageCenterBubble;
   class PopupBubble;
   friend class internal::WebNotificationButtonView;
   friend class internal::WebNotificationMenuModel;
@@ skipping 14 matching lines @@
   // Disables all notifications matching notification |id|.
   void DisableByExtension(const std::string& id);
   void DisableByUrl(const std::string& id);
 
   // Requests the Delegate to the settings dialog.
   void ShowSettings(const std::string& id);
 
   // Called when a notification is clicked on. Event is passed to the Delegate.
   void OnClicked(const std::string& id);
 
+  // Shows or hides the message center bubble.
+  void ToggleMessageCenterBubble();
+
   // Shows or updates the message center bubble and hides the popup bubble.
   void ShowMessageCenterBubble();
 
   // Hides the message center bubble if visible.
   void HideMessageCenterBubble();
 
   // Shows or updates the popup notification bubble if appropriate.
   void ShowPopupBubble();
 
   // Hides the notification bubble if visible.
@@ skipping 19 matching lines @@
     return notification_list_.get();
   }
   MessageCenterBubble* message_center_bubble() const {
     return message_center_bubble_.get();
   }
   PopupBubble* popup_bubble() const { return popup_bubble_.get(); }
 
   scoped_ptr<internal::WebNotificationList> notification_list_;
   scoped_ptr<MessageCenterBubble> message_center_bubble_;
   scoped_ptr<PopupBubble> popup_bubble_;
-  views::Label* count_label_;
+  views::ImageButton* button_;
   Delegate* delegate_;
   bool show_message_center_on_unlock_;
 
   DISALLOW_COPY_AND_ASSIGN(WebNotificationTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_