Add OVERRIDE to chrome/renderer.

chrome/renderer/extensions/extension_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_EXTENSIONS_EXTENSION_HELPER_H_
 #define CHROME_RENDERER_EXTENSIONS_EXTENSION_HELPER_H_
 #pragma once
 
 #include <map>
 #include <vector>
@@ skipping 38 matching lines @@
 
   void InlineWebstoreInstall(int install_id,
                              std::string webstore_item_id,
                              GURL requestor_url);
 
   int browser_window_id() const { return browser_window_id_; }
   content::ViewType view_type() const { return view_type_; }
 
  private:
   // RenderViewObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message);
-  virtual void DidFinishDocumentLoad(WebKit::WebFrame* frame);
-  virtual void DidFinishLoad(WebKit::WebFrame* frame);
-  virtual void DidCreateDocumentElement(WebKit::WebFrame* frame);
-  virtual void DidStartProvisionalLoad(WebKit::WebFrame* frame);
-  virtual void FrameDetached(WebKit::WebFrame* frame);
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void DidFinishDocumentLoad(WebKit::WebFrame* frame) OVERRIDE;
+  virtual void DidFinishLoad(WebKit::WebFrame* frame) OVERRIDE;
+  virtual void DidCreateDocumentElement(WebKit::WebFrame* frame) OVERRIDE;
+  virtual void DidStartProvisionalLoad(WebKit::WebFrame* frame) OVERRIDE;
+  virtual void FrameDetached(WebKit::WebFrame* frame) OVERRIDE;
   virtual void DidCreateDataSource(WebKit::WebFrame* frame,
-                                   WebKit::WebDataSource* ds);
+                                   WebKit::WebDataSource* ds) OVERRIDE;
 
   void OnExtensionResponse(int request_id, bool success,
                            const std::string& response,
                            const std::string& error);
   void OnExtensionMessageInvoke(const std::string& extension_id,
                                 const std::string& function_name,
                                 const base::ListValue& args,
                                 const GURL& event_url);
   void OnExtensionDeliverMessage(int target_port_id,
                                  const std::string& message);
@@ skipping 39 matching lines @@
   // Type of view attached with RenderView.
   content::ViewType view_type_;
 
   // Id number of browser window which RenderView is attached to.
   int browser_window_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHelper);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_EXTENSION_HELPER_H_