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

chrome/browser/ui/webui/extensions/extensions_ui.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_UI_WEBUI_EXTENSIONS_EXTENSIONS_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSIONS_UI_H_
 
 #include "base/basictypes.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/base/layout.h"
 
 namespace base {
 class RefCountedMemory;
 }
 
 namespace extensions {
 
 class ExtensionsUI : public content::WebUIController {
  public:
   explicit ExtensionsUI(content::WebUI* web_ui);
-  virtual ~ExtensionsUI();
+  ~ExtensionsUI() override;
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ExtensionsUI);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSIONS_UI_H_