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

chrome/browser/metrics/variations/variations_service.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_METRICS_VARIATIONS_VARIATIONS_SERVICE_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SERVICE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 54 matching lines @@
 
     // Called when the VariationsService detects that there will be significant
     // experiment changes on a restart. This notification can then be used to
     // update UI (i.e. badging an icon).
     virtual void OnExperimentChangesDetected(Severity severity) = 0;
 
    protected:
     virtual ~Observer() {}
   };
 
-  virtual ~VariationsService();
+  ~VariationsService() override;
 
   // Creates field trials based on Variations Seed loaded from local prefs. If
   // there is a problem loading the seed data, all trials specified by the seed
   // may not be created.
   bool CreateTrialsFromSeed();
 
   // Calls FetchVariationsSeed once and repeats this periodically. See
   // implementation for details on the period. Must be called after
   // |CreateTrialsFromSeed|.
   void StartRepeatedVariationsSeedFetch();
@@ skipping 80 matching lines @@
 
   // Checks if prerequisites for fetching the Variations seed are met, and if
   // so, performs the actual fetch using |DoActualFetch|.
   void FetchVariationsSeed();
 
   // Notify any observers of this service based on the simulation |result|.
   void NotifyObservers(
       const variations::VariationsSeedSimulator::Result& result);
 
   // net::URLFetcherDelegate implementation:
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   // ResourceRequestAllowedNotifier::Observer implementation:
-  virtual void OnResourceRequestsAllowed() override;
+  void OnResourceRequestsAllowed() override;
 
   // Performs a variations seed simulation with the given |seed| and |version|
   // and logs the simulation results as histograms.
   void PerformSimulationWithVersion(scoped_ptr<variations::VariationsSeed> seed,
                                     const base::Version& version);
 
   // Record the time of the most recent successful fetch.
   void RecordLastFetchTime();
 
   // The pref service used to store persist the variations seed.
@@ skipping 45 matching lines @@
 #endif
 
   base::WeakPtrFactory<VariationsService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VariationsService);
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SERVICE_H_