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

chrome/browser/ui/webui/memory_internals/memory_internals_handler.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_UI_WEBUI_MEMORY_INTERNALS_MEMORY_INTERNALS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_MEMORY_INTERNALS_MEMORY_INTERNALS_HANDLER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 namespace base {
 class ListValue;
 }
 
 class MemoryInternalsProxy;
 
 // This class handles messages to and from MemoryInternalsUI.
 // It does all its work on the IO thread through the proxy below.
 class MemoryInternalsHandler : public content::WebUIMessageHandler {
  public:
   MemoryInternalsHandler();
-  virtual ~MemoryInternalsHandler();
+  ~MemoryInternalsHandler() override;
 
-  virtual void RegisterMessages() override;
+  void RegisterMessages() override;
 
   // JavaScript message handlers.
   void OnJSUpdate(const base::ListValue* list);
 
   // MemoryInternals message handlers.
   void OnUpdate(const base::string16& update);
 
  private:
   scoped_refptr<MemoryInternalsProxy> proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryInternalsHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEMORY_INTERNALS_MEMORY_INTERNALS_HANDLER_H_