Standardize usage of virtual/override/final in extensions/

extensions/browser/app_window/app_window_registry.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 EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_REGISTRY_H_
 #define EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_REGISTRY_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 37 matching lines @@
 
    protected:
     virtual ~Observer();
   };
 
   typedef std::list<AppWindow*> AppWindowList;
   typedef AppWindowList::const_iterator const_iterator;
   typedef std::set<std::string> InspectedWindowSet;
 
   explicit AppWindowRegistry(content::BrowserContext* context);
-  virtual ~AppWindowRegistry();
+  ~AppWindowRegistry() override;
 
   // Returns the instance for the given browser context, or NULL if none. This
   // is a convenience wrapper around
   // AppWindowRegistry::Factory::GetForBrowserContext().
   static AppWindowRegistry* Get(content::BrowserContext* context);
 
   void AddAppWindow(AppWindow* app_window);
   void AppWindowIconChanged(AppWindow* app_window);
   // Called by |app_window| when it is activated.
   void AppWindowActivated(AppWindow* app_window);
@@ skipping 36 matching lines @@
     static AppWindowRegistry* GetForBrowserContext(
         content::BrowserContext* context,
         bool create);
 
     static Factory* GetInstance();
 
    private:
     friend struct DefaultSingletonTraits<Factory>;
 
     Factory();
-    virtual ~Factory();
+    ~Factory() override;
 
     // BrowserContextKeyedServiceFactory
-    virtual KeyedService* BuildServiceInstanceFor(
+    KeyedService* BuildServiceInstanceFor(
         content::BrowserContext* context) const override;
-    virtual bool ServiceIsCreatedWithBrowserContext() const override;
-    virtual bool ServiceIsNULLWhileTesting() const override;
-    virtual content::BrowserContext* GetBrowserContextToUse(
+    bool ServiceIsCreatedWithBrowserContext() const override;
+    bool ServiceIsNULLWhileTesting() const override;
+    content::BrowserContext* GetBrowserContextToUse(
         content::BrowserContext* context) const override;
   };
 
  protected:
   void OnDevToolsStateChanged(content::DevToolsAgentHost*, bool attached);
 
  private:
   // Ensures the specified |app_window| is included in |app_windows_|.
   // Otherwise adds |app_window| to the back of |app_windows_|.
   void AddAppWindowToList(AppWindow* app_window);
 
   // Bring |app_window| to the front of |app_windows_|. If it is not in the
   // list, add it first.
   void BringToFront(AppWindow* app_window);
 
   content::BrowserContext* context_;
   AppWindowList app_windows_;
   InspectedWindowSet inspected_windows_;
   ObserverList<Observer> observers_;
   base::Callback<void(content::DevToolsAgentHost*, bool)> devtools_callback_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_REGISTRY_H_