Add OVERRIDE to chrome/browser/.

chrome/browser/background/background_application_list_model.h

 // Copyright (c) 2011 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_BACKGROUND_BACKGROUND_APPLICATION_LIST_MODEL_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_APPLICATION_LIST_MODEL_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 87 matching lines @@
 
   // Returns the Application associated with |extension| or NULL.
   const Application* FindApplication(const Extension* extension) const;
 
   // Returns the Application associated with |extension| or NULL.
   Application* FindApplication(const Extension* extension);
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+                       const content::NotificationDetails& details) OVERRIDE;
 
   // Notifies observers that some of the data associated with this background
   // application, e. g. the Icon, has changed.
   void SendApplicationDataChangedNotifications(const Extension* extension);
 
   // Notifies observers that at least one background application has been added
   // or removed.
   void SendApplicationListChangedNotifications();
 
   // Invoked by Observe for NOTIFICATION_EXTENSION_LOADED.
@@ skipping 14 matching lines @@
   ApplicationMap applications_;
   ExtensionList extensions_;
   ObserverList<Observer> observers_;
   Profile* profile_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundApplicationListModel);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_APPLICATION_LIST_MODEL_H_