Add OVERRIDE to chrome/browser/chromeos/.

chrome/browser/chromeos/enterprise_extension_observer.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_CHROMEOS_ENTERPRISE_EXTENSION_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_ENTERPRISE_EXTENSION_OBSERVER_H_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 
 class FilePath;
 class Profile;
 
 namespace chromeos {
 
 // This observer listens for installed extensions and restarts the ChromeOS
 // Enterprise daemon if an Enterprise Extension gets installed.
 class EnterpriseExtensionObserver
     : public content::NotificationObserver {
  public:
   explicit EnterpriseExtensionObserver(Profile* profile);
   virtual ~EnterpriseExtensionObserver() {}
 
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
+                       const content::NotificationDetails& details) OVERRIDE;
 
  private:
   static void CheckExtensionAndNotifyEntd(const FilePath& path);
   static void NotifyEntd();
 
   Profile* profile_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(EnterpriseExtensionObserver);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ENTERPRISE_EXTENSION_OBSERVER_H_