Add OVERRIDE to chrome/renderer.

chrome/renderer/print_web_view_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_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 88 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
                            BlockScriptInitiatedPrinting);
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, OnPrintPages);
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintLayoutTest);
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintWithIframe);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
   // RenderViewObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message);
-  virtual void PrintPage(WebKit::WebFrame* frame);
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void PrintPage(WebKit::WebFrame* frame) OVERRIDE;
 
   // Message handlers ---------------------------------------------------------
 
   // Print the document.
   void OnPrintPages();
 
   // Print the document with the print preview frame/node.
   void OnPrintForSystemDialog();
 
   // Initiate print preview.
@@ skipping 302 matching lines @@
 
     State state_;
   };
 
   PrintPreviewContext print_preview_context_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 #endif  // CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_