Add OVERRIDE to chrome/browser/.

chrome/browser/profiles/profile_io_data.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_PROFILES_PROFILE_IO_DATA_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_
 #pragma once
 
 #include <string>
 
@@ skipping 212 matching lines @@
     return main_request_context_;
   }
 
  private:
   class ResourceContext : public content::ResourceContext {
    public:
     explicit ResourceContext(const ProfileIOData* io_data);
     virtual ~ResourceContext();
 
    private:
-    virtual void EnsureInitialized() const;
+    virtual void EnsureInitialized() const OVERRIDE;
 
     const ProfileIOData* const io_data_;
   };
 
   typedef base::hash_map<std::string, scoped_refptr<ChromeURLRequestContext> >
       AppRequestContextMap;
 
   // --------------------------------------------
   // Virtual interface for subtypes to implement:
   // --------------------------------------------
@@ skipping 72 matching lines @@
   // One AppRequestContext per isolated app.
   mutable AppRequestContextMap app_request_context_map_;
 
   // TODO(jhawkins): Remove once crbug.com/102004 is fixed.
   bool initialized_on_UI_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileIOData);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_