Add OVERRIDE to chrome/browser/.

chrome/browser/printing/cloud_print/cloud_print_setup_handler.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_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_HANDLER_H_
 #define CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_HANDLER_H_
 #pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_setup_flow.h"
@@ skipping 11 matching lines @@
    public:
     virtual ~Delegate() {}
     // Called when the setup dialog is closed.
     virtual void OnCloudPrintSetupClosed() = 0;
   };
 
   explicit CloudPrintSetupHandler(Delegate* handler);
   virtual ~CloudPrintSetupHandler();
 
   // CloudPrintSetupFlow::Delegate implementation.
-  virtual void OnDialogClosed();
+  virtual void OnDialogClosed() OVERRIDE;
 
  private:
   Delegate* handler_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPrintSetupHandler);
 };
 
 // Workaround for MSVC 2005 not handling inheritance from nested classes well.
 typedef CloudPrintSetupHandler::Delegate CloudPrintSetupHandlerDelegate;
 
 #endif  // CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_HANDLER_H_