Add OVERRIDE to net/.

net/http/mock_allow_url_security_manager.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 NET_HTTP_MOCK_ALLOW_URL_SECURITY_MANAGER_H_
 #define NET_HTTP_MOCK_ALLOW_URL_SECURITY_MANAGER_H_
 #pragma once
 
 #include "net/http/url_security_manager.h"
 
 namespace net {
 
 // An URLSecurityManager which is very permissive and which should only be used
 // in unit testing.
 class MockAllowURLSecurityManager : public URLSecurityManager {
  public:
   MockAllowURLSecurityManager();
   virtual ~MockAllowURLSecurityManager();
 
-  virtual bool CanUseDefaultCredentials(const GURL& auth_origin) const;
-  virtual bool CanDelegate(const GURL& auth_origin) const;
+  virtual bool CanUseDefaultCredentials(const GURL& auth_origin) const OVERRIDE;
+  virtual bool CanDelegate(const GURL& auth_origin) const OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockAllowURLSecurityManager);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_MOCK_ALLOW_URL_SECURITY_MANAGER_H_