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

chrome/browser/supervised_user/supervised_user_settings_service.h

Index: chrome/browser/supervised_user/supervised_user_settings_service.h
diff --git a/chrome/browser/supervised_user/supervised_user_settings_service.h b/chrome/browser/supervised_user/supervised_user_settings_service.h
index e600c794727574ee5eb5992d8da9e7a643ea7baa..31be839993de1d6ca4170fb068e68ec9add2ce7a 100644
--- a/chrome/browser/supervised_user/supervised_user_settings_service.h
+++ b/chrome/browser/supervised_user/supervised_user_settings_service.h
@@ -59,7 +59,7 @@ class SupervisedUserSettingsService : public KeyedService,
   typedef base::Callback<void(const base::DictionaryValue*)> SettingsCallback;
 
   SupervisedUserSettingsService();
-  virtual ~SupervisedUserSettingsService();
+  ~SupervisedUserSettingsService() override;
 
   // Initializes the service by loading its settings from a file underneath the
   // |profile_path|. File I/O will be serialized via the
@@ -109,24 +109,23 @@ class SupervisedUserSettingsService : public KeyedService,
                                                    const base::Value& value);
 
   // KeyedService implementation:
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
   // SyncableService implementation:
-  virtual syncer::SyncMergeResult MergeDataAndStartSyncing(
+  syncer::SyncMergeResult MergeDataAndStartSyncing(
       syncer::ModelType type,
       const syncer::SyncDataList& initial_sync_data,
       scoped_ptr<syncer::SyncChangeProcessor> sync_processor,
       scoped_ptr<syncer::SyncErrorFactory> error_handler) override;
-  virtual void StopSyncing(syncer::ModelType type) override;
-  virtual syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const
-      override;
-  virtual syncer::SyncError ProcessSyncChanges(
+  void StopSyncing(syncer::ModelType type) override;
+  syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
+  syncer::SyncError ProcessSyncChanges(
       const tracked_objects::Location& from_here,
       const syncer::SyncChangeList& change_list) override;
 
   // PrefStore::Observer implementation:
-  virtual void OnPrefValueChanged(const std::string& key) override;
-  virtual void OnInitializationCompleted(bool success) override;
+  void OnPrefValueChanged(const std::string& key) override;
+  void OnInitializationCompleted(bool success) override;
 
  private:
   base::DictionaryValue* GetOrCreateDictionary(const std::string& key) const;