Add OVERRIDE to chrome/browser/.

chrome/browser/browsing_data_cookie_helper.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_BROWSING_DATA_COOKIE_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_COOKIE_HELPER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 94 matching lines @@
                         const net::CookieOptions& options);
 
   // Clears the list of canned cookies.
   void Reset();
 
   // True if no cookie are currently stored.
   bool empty() const;
 
   // BrowsingDataCookieHelper methods.
   virtual void StartFetching(
-      const net::CookieMonster::GetCookieListCallback& callback);
-  virtual void CancelNotification();
+      const net::CookieMonster::GetCookieListCallback& callback) OVERRIDE;
+  virtual void CancelNotification() OVERRIDE;
 
  private:
   // Check if the cookie list contains a cookie with the same name,
   // domain, and path as the newly created cookie. Delete the old cookie
   // if does.
   bool DeleteMetchingCookie(
       const net::CookieMonster::CanonicalCookie& add_cookie);
 
   virtual ~CannedBrowsingDataCookieHelper();
 
   net::CookieList cookie_list_;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataCookieHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_COOKIE_HELPER_H_