Standardize usage of virtual/override/final in extensions/

extensions/browser/api/power/power_api_manager.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_API_POWER_POWER_API_MANAGER_H_
 #define EXTENSIONS_BROWSER_API_POWER_POWER_API_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 33 matching lines @@
 
   // Removes an extension lock for an extension. Calling this for an
   // extension id without a lock will do nothing.
   void RemoveRequest(const std::string& extension_id);
 
   // Replaces the function that will be called to create PowerSaveBlocker
   // objects.  Passing an empty callback will revert to the default.
   void SetCreateBlockerFunctionForTesting(CreateBlockerFunction function);
 
   // Overridden from extensions::ExtensionRegistryObserver.
-  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;
 
  private:
   friend class BrowserContextKeyedAPIFactory<PowerApiManager>;
 
   explicit PowerApiManager(content::BrowserContext* context);
-  virtual ~PowerApiManager();
+  ~PowerApiManager() override;
 
   // Updates |power_save_blocker_| and |current_level_| after iterating
   // over |extension_levels_|.
   void UpdatePowerSaveBlocker();
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() { return "PowerApiManager"; }
   static const bool kServiceRedirectedInIncognito = true;
   static const bool kServiceIsCreatedWithBrowserContext = false;
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
   content::BrowserContext* browser_context_;
 
   // Function that should be called to create PowerSaveBlocker objects.
   // Tests can change this to record what would've been done instead of
   // actually changing the system power-saving settings.
   CreateBlockerFunction create_blocker_function_;
 
   scoped_ptr<content::PowerSaveBlocker> power_save_blocker_;
 
   // Current level used by |power_save_blocker_|.  Meaningless if
   // |power_save_blocker_| is NULL.
   core_api::power::Level current_level_;
 
   // Map from extension ID to the corresponding level for each extension
   // that has an outstanding request.
   typedef std::map<std::string, core_api::power::Level> ExtensionLevelMap;
   ExtensionLevelMap extension_levels_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerApiManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_POWER_POWER_API_MANAGER_H_