Add OVERRIDE to chrome/browser/.

chrome/browser/mock_browsing_data_database_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_MOCK_BROWSING_DATA_DATABASE_HELPER_H_
 #define CHROME_BROWSER_MOCK_BROWSING_DATA_DATABASE_HELPER_H_
 #pragma once
 
 #include <list>
 #include <map>
 
 #include "base/callback.h"
 #include "chrome/browser/browsing_data_database_helper.h"
 
 // Mock for BrowsingDataDatabaseHelper.
 // Use AddDatabaseSamples() or add directly to response_ list, then call
 // Notify().
 class MockBrowsingDataDatabaseHelper : public BrowsingDataDatabaseHelper {
  public:
   explicit MockBrowsingDataDatabaseHelper(Profile* profile);
 
   virtual void StartFetching(
       const base::Callback<void(const std::list<DatabaseInfo>&)>& callback)
           OVERRIDE;
 
-  virtual void CancelNotification();
+  virtual void CancelNotification() OVERRIDE;
 
   virtual void DeleteDatabase(const std::string& origin,
-      const std::string& name);
+      const std::string& name) OVERRIDE;
 
   // Adds some DatabaseInfo samples.
   void AddDatabaseSamples();
 
   // Notifies the callback.
   void Notify();
 
   // Marks all databases as existing.
   void Reset();
 
@@ skipping 12 matching lines @@
 
   base::Callback<void(const std::list<DatabaseInfo>&)> callback_;
 
   // Stores which databases exist.
   std::map<const std::string, bool> databases_;
 
   std::list<DatabaseInfo> response_;
 };
 
 #endif  // CHROME_BROWSER_MOCK_BROWSING_DATA_DATABASE_HELPER_H_