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

chrome/browser/extensions/api/idle/idle_manager.h

 // Copyright (c) 2012 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_EXTENSIONS_API_IDLE_IDLE_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDLE_IDLE_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 51 matching lines @@
     virtual void OnStateChanged(const std::string& extension_id,
                                 IdleState new_state) = 0;
     virtual void RegisterObserver(EventRouter::Observer* observer) = 0;
     virtual void UnregisterObserver(EventRouter::Observer* observer) = 0;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(EventDelegate);
   };
 
   explicit IdleManager(Profile* profile);
-  virtual ~IdleManager();
+  ~IdleManager() override;
 
   void Init();
 
   // KeyedService implementation.
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
   // ExtensionRegistryObserver implementation.
-  virtual void OnExtensionUnloaded(
-      content::BrowserContext* browser_context,
-      const Extension* extension,
-      UnloadedExtensionInfo::Reason reason) override;
+  void OnExtensionUnloaded(content::BrowserContext* browser_context,
+                           const Extension* extension,
+                           UnloadedExtensionInfo::Reason reason) override;
 
   // EventRouter::Observer implementation.
-  virtual void OnListenerAdded(const EventListenerInfo& details) override;
-  virtual void OnListenerRemoved(const EventListenerInfo& details) override;
+  void OnListenerAdded(const EventListenerInfo& details) override;
+  void OnListenerRemoved(const EventListenerInfo& details) override;
 
   void QueryState(int threshold, QueryStateCallback notify);
   void SetThreshold(const std::string& extension_id, int threshold);
   static base::StringValue* CreateIdleValue(IdleState idle_state);
 
   // Override default event class. Callee assumes ownership. Used for testing.
   void SetEventDelegateForTest(scoped_ptr<EventDelegate> event_delegate);
 
   // Override default idle time calculations. Callee assumes ownership. Used
   // for testing.
@@ skipping 39 matching lines @@
       extension_registry_observer_;
 
   base::WeakPtrFactory<IdleManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IdleManager);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDLE_IDLE_MANAGER_H_