Standardize usage of virtual/override/final in content/browser/

content/browser/fileapi/mock_url_request_delegate.h

 // Copyright 2014 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 CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H
 #define CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H
 
 #include "net/url_request/url_request.h"
 
 namespace net {
 class IOBuffer;
 }
 
 namespace content {
 
 // A URL request delegate that receives the response body.
 class MockURLRequestDelegate : public net::URLRequest::Delegate {
  public:
   MockURLRequestDelegate();
-  virtual ~MockURLRequestDelegate();
+  ~MockURLRequestDelegate() override;
 
-  virtual void OnResponseStarted(net::URLRequest* request) override;
-  virtual void OnReadCompleted(net::URLRequest* request,
-                               int bytes_read) override;
+  void OnResponseStarted(net::URLRequest* request) override;
+  void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
   const std::string& response_data() const { return response_data_; }
 
  private:
   void ReadSome(net::URLRequest* request);
   void ReceiveData(net::URLRequest* request, int bytes_read);
   void RequestComplete();
 
   scoped_refptr<net::IOBuffer> io_buffer_;
   std::string response_data_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FILEAPI_MOCK_URL_REQUEST_DELEGATE_H