Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/intercept_download_resource_throttle.h

 // Copyright 2013 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_ANDROID_INTERCEPT_DOWNLOAD_RESOURCE_THROTTLE_H_
 #define CHROME_BROWSER_ANDROID_INTERCEPT_DOWNLOAD_RESOURCE_THROTTLE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/public/browser/resource_throttle.h"
 
 namespace net {
 class URLRequest;
 }
 
 namespace chrome {
 
 // InterceptDownloadResourceThrottle checks if a download request should be
 // handled by Chrome or passsed to the Android Download Manager.
 class InterceptDownloadResourceThrottle : public content::ResourceThrottle {
  public:
   InterceptDownloadResourceThrottle(net::URLRequest* request,
                                     int render_process_id,
                                     int render_view_id,
                                     int request_id);
 
   // content::ResourceThrottle implementation:
-  virtual void WillProcessResponse(bool* defer) override;
-  virtual const char* GetNameForLogging() const override;
+  void WillProcessResponse(bool* defer) override;
+  const char* GetNameForLogging() const override;
 
  private:
-  virtual ~InterceptDownloadResourceThrottle();
+  ~InterceptDownloadResourceThrottle() override;
 
   void ProcessDownloadRequest();
   // Set to true when if we want chrome to handle the download.
   const net::URLRequest* request_;
   int render_process_id_;
   int render_view_id_;
   int request_id_;
 
   DISALLOW_COPY_AND_ASSIGN(InterceptDownloadResourceThrottle);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_INTERCEPT_DOWNLOAD_RESOURCE_THROTTLE_H_