Standardize usage of virtual/override/final in components/

components/power/origin_power_map.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 COMPONENTS_POWER_ORIGIN_POWER_MAP_H_
 #define COMPONENTS_POWER_ORIGIN_POWER_MAP_H_
 
 #include <map>
 
 #include "base/callback_list.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "url/gurl.h"
 
 namespace power {
 
 // Tracks app and website origins and how much power they are consuming while
 // running.
 class OriginPowerMap : public KeyedService {
  public:
   typedef std::map<GURL, int> PercentOriginMap;
   typedef base::CallbackList<void(void)>::Subscription Subscription;
 
   OriginPowerMap();
-  virtual ~OriginPowerMap();
+  ~OriginPowerMap() override;
 
   // Returns the integer percentage usage of the total power consumed by a
   // given URL's origin.
   int GetPowerForOrigin(const GURL& url);
 
   // Adds a certain amount of power consumption to a given URL's origin.
   // |power| is a platform-specific heuristic estimating power consumption.
   void AddPowerForOrigin(const GURL& url, double power);
 
   // Returns a map of all origins to the integer percentage usage of power
@@ skipping 22 matching lines @@
   double total_consumed_;
 
   base::CallbackList<void(void)> callback_list_;
 
   DISALLOW_COPY_AND_ASSIGN(OriginPowerMap);
 };
 
 }  // namespace power
 
 #endif  // COMPONENTS_POWER_ORIGIN_POWER_MAP_H_