Add OVERRIDE to chrome/test/.

chrome/test/base/test_url_request_context_getter.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_TEST_BASE_TEST_URL_REQUEST_CONTEXT_GETTER_H_
 #define CHROME_TEST_BASE_TEST_URL_REQUEST_CONTEXT_GETTER_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "net/url_request/url_request_context_getter.h"
 
 namespace base {
 class MessageLoopProxy;
 }
 
 // Used to return a dummy context (normally the context is on the IO thread).
 // The one here can be run on the main test thread. Note that this can lead to
 // a leak if your test does not have a BrowserThread::IO in it because
 // URLRequestContextGetter is defined as a ReferenceCounted object with a
 // special trait that deletes it on the IO thread.
 class TestURLRequestContextGetter : public net::URLRequestContextGetter {
  public:
   TestURLRequestContextGetter();
   virtual ~TestURLRequestContextGetter();
 
   // net::URLRequestContextGetter implementation.
-  virtual net::URLRequestContext* GetURLRequestContext();
-  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() const;
+  virtual net::URLRequestContext* GetURLRequestContext() OVERRIDE;
+  virtual scoped_refptr<base::MessageLoopProxy>
+      GetIOMessageLoopProxy() const OVERRIDE;
 
  private:
   scoped_refptr<net::URLRequestContext> context_;
 };
 
 #endif  // CHROME_TEST_BASE_TEST_URL_REQUEST_CONTEXT_GETTER_H_