Remove the most obvious dead code from message center.

chrome/browser/ui/cocoa/notifications/message_center_tray_bridge.h

 // Copyright (c) 2013 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 CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_MESSAGE_CENTER_TRAY_BRIDGE_H_
 #define CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_MESSAGE_CENTER_TRAY_BRIDGE_H_
 
 #import <AppKit/AppKit.h>
 
 #include "base/basictypes.h"
@@ skipping 18 matching lines @@
     public message_center::MessageCenterTrayDelegate {
  public:
   explicit MessageCenterTrayBridge(
       message_center::MessageCenter* message_center);
   virtual ~MessageCenterTrayBridge();
 
   // message_center::MessageCenterTrayDelegate:
   virtual void OnMessageCenterTrayChanged() OVERRIDE;
   virtual bool ShowPopups() OVERRIDE;
   virtual void HidePopups() OVERRIDE;
-  virtual void UpdatePopups() OVERRIDE;
   virtual bool ShowMessageCenter() OVERRIDE;
   virtual void HideMessageCenter() OVERRIDE;
   virtual bool ShowNotifierSettings() OVERRIDE;
 
   message_center::MessageCenter* message_center() { return message_center_; }
 
  private:
   friend class MessageCenterTrayBridgeTest;
 
   // Updates the unread count on the status item.
@@ skipping 17 matching lines @@
   // Obj-C controller for the on-screen popup notifications.
   base::scoped_nsobject<MCPopupCollection> popup_collection_;
 
   // Weak pointer factory to posts tasks to self.
   base::WeakPtrFactory<MessageCenterTrayBridge> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenterTrayBridge);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_MESSAGE_CENTER_TRAY_BRIDGE_H_