Adds an ash global shortcut key for message center.

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_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
 #define ASH_SYSTEM_WEB_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"
@@ skipping 45 matching lines @@
 
   // Returns true if it should block the auto hide behavior of the launcher.
   bool ShouldBlockLauncherAutoHide() const;
 
   // Returns true if the message center bubble is visible.
   bool IsMessageCenterBubbleVisible() const;
 
   // Returns true if the mouse is inside the notification bubble.
   bool IsMouseInNotificationBubble() const;
 
+  // Shows the message center bubble.
+  void ShowMessageCenterBubble();
+
   // Overridden from TrayBackgroundView.
   virtual void SetShelfAlignment(ShelfAlignment alignment) OVERRIDE;
   virtual void AnchorUpdated() OVERRIDE;
   virtual string16 GetAccessibleNameForTray() OVERRIDE;
   virtual void HideBubbleWithView(
       const views::TrayBubbleView* bubble_view) OVERRIDE;
   virtual bool ClickedOutsideBubble() OVERRIDE;
 
   // Overridden from internal::ActionableView.
   virtual bool PerformAction(const ui::Event& event) OVERRIDE;
@@ skipping 36 matching lines @@
   // Queries login status and the status area widget to determine visibility of
   // the message center.
   bool ShouldShowMessageCenter();
 
  // Returns true if it should show the quiet mode bubble.
   bool ShouldShowQuietModeBubble(const ui::Event& event);
 
   // Shows the quiet mode bubble.
   void ShowQuietModeBubble();
 
-
   internal::WebNotificationBubbleWrapper* message_center_bubble() const {
     return message_center_bubble_.get();
   }
 
   internal::WebNotificationBubbleWrapper* popup_bubble() const {
     return popup_bubble_.get();
   }
 
   message_center::QuietModeBubble* quiet_mode_bubble() const {
     return quiet_mode_bubble_.get();
@@ skipping 11 matching lines @@
   views::ImageButton* button_;
 
   bool show_message_center_on_unlock_;
 
   DISALLOW_COPY_AND_ASSIGN(WebNotificationTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_