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

chrome/browser/notifications/message_center_stats_collector.h

 // Copyright 2013 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_NOTIFICATIONS_MESSAGE_CENTER_STATS_COLLECTOR_H_
 #define CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_STATS_COLLECTOR_H_
 
 #include <set>
 #include <string>
 
@@ skipping 21 matching lines @@
     NOTIFICATION_ACTION_CLOSE_BY_USER,
     NOTIFICATION_ACTION_CLOSE_BY_SYSTEM,
     // NOTE: Add new action types only immediately above this line. Also,
     // make sure the enum list in tools/histogram/histograms.xml is
     // updated with any change in here.
     NOTIFICATION_ACTION_COUNT
   };
 
   explicit MessageCenterStatsCollector(
       message_center::MessageCenter* message_center);
-  virtual ~MessageCenterStatsCollector();
+  ~MessageCenterStatsCollector() override;
 
  private:
   // Represents the aggregate stats for each notification.
   class NotificationStats {
    public:
     // Default constructor for map.
     NotificationStats();
 
     explicit NotificationStats(const std::string& id);
     virtual ~NotificationStats();
 
     // Called when we get an action from the message center.
     void CollectAction(NotificationActionType type);
 
     // Sends aggregate data to UMA.
     void RecordAggregateStats();
 
    private:
     std::string id_;
     bool actions_[NOTIFICATION_ACTION_COUNT];
   };
 
   // MessageCenterObserver
-  virtual void OnNotificationAdded(const std::string& notification_id) override;
-  virtual void OnNotificationRemoved(const std::string& notification_id,
-                                     bool by_user) override;
-  virtual void OnNotificationUpdated(
-      const std::string& notification_id) override;
-  virtual void OnNotificationClicked(
-      const std::string& notification_id) override;
-  virtual void OnNotificationButtonClicked(const std::string& notification_id,
-                                           int button_index) override;
-  virtual void OnNotificationDisplayed(
+  void OnNotificationAdded(const std::string& notification_id) override;
+  void OnNotificationRemoved(const std::string& notification_id,
+                             bool by_user) override;
+  void OnNotificationUpdated(const std::string& notification_id) override;
+  void OnNotificationClicked(const std::string& notification_id) override;
+  void OnNotificationButtonClicked(const std::string& notification_id,
+                                   int button_index) override;
+  void OnNotificationDisplayed(
       const std::string& notification_id,
       const message_center::DisplaySource source) override;
-  virtual void OnCenterVisibilityChanged(
+  void OnCenterVisibilityChanged(
       message_center::Visibility visibility) override;
-  virtual void OnQuietModeChanged(bool in_quiet_mode) override;
+  void OnQuietModeChanged(bool in_quiet_mode) override;
 
   // Weak, global.
   message_center::MessageCenter* message_center_;
 
   typedef std::map<std::string,NotificationStats> StatsCollection;
   StatsCollection stats_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenterStatsCollector);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_MESSAGE_CENTER_STATS_COLLECTOR_H_