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

chrome/browser/safe_json_parser.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_SAFE_JSON_PARSER_H_
 #define CHROME_BROWSER_SAFE_JSON_PARSER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 18 matching lines @@
   typedef base::Callback<void(scoped_ptr<base::Value>)> SuccessCallback;
   typedef base::Callback<void(const std::string&)> ErrorCallback;
 
   SafeJsonParser(const std::string& unsafe_json,
                  const SuccessCallback& success_callback,
                  const ErrorCallback& error_callback);
 
   void Start();
 
  private:
-  virtual ~SafeJsonParser();
+  ~SafeJsonParser() override;
 
   void StartWorkOnIOThread();
 
   void OnJSONParseSucceeded(const base::ListValue& wrapper);
   void OnJSONParseFailed(const std::string& error_message);
 
   void ReportResults();
   void ReportResultOnUIThread();
 
   // Implementing pieces of the UtilityProcessHostClient interface.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
   const std::string unsafe_json_;
   SuccessCallback success_callback_;
   ErrorCallback error_callback_;
 
   scoped_ptr<base::Value> parsed_json_;
   std::string error_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeJsonParser);
 };
 
 #endif  // CHROME_BROWSER_SAFE_JSON_PARSER_H_