Add OVERRIDE to chrome/browser/extensions/.

chrome/browser/extensions/extension_webrequest_api.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_EXTENSIONS_EXTENSION_WEBREQUEST_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBREQUEST_API_H_
 #pragma once
 
 #include <list>
 #include <map>
@@ skipping 324 matching lines @@
   // webRequest API.
   scoped_ptr<ExtensionWebRequestTimeTracker> request_time_tracker_;
 
   CallbacksForPageLoad callbacks_for_page_load_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionWebRequestEventRouter);
 };
 
 class WebRequestAddEventListener : public SyncIOThreadExtensionFunction {
  public:
-  virtual bool RunImpl();
+  virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.webRequest.addEventListener");
 };
 
 class WebRequestEventHandled : public SyncIOThreadExtensionFunction {
  public:
-  virtual bool RunImpl();
+  virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.webRequest.eventHandled");
 };
 
 class WebRequestHandlerBehaviorChanged : public SyncIOThreadExtensionFunction {
  public:
-  virtual bool RunImpl();
+  virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.webRequest.handlerBehaviorChanged");
 
  private:
   virtual void GetQuotaLimitHeuristics(
       std::list<QuotaLimitHeuristic*>* heuristics) const OVERRIDE;
   // Handle quota exceeded gracefully: Only warn the user but still execute the
   // function.
   virtual void OnQuotaExceeded() OVERRIDE;
 };
 
 // Send updates to |host| with information about what webRequest-related
 // extensions are installed.
 // TODO(mpcomplete): remove. http://crbug.com/100411
 void SendExtensionWebRequestStatusToHost(content::RenderProcessHost* host);
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBREQUEST_API_H_