Standardize usage of virtual/override/final in cc/

cc/debug/rasterize_and_record_benchmark.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 CC_DEBUG_RASTERIZE_AND_RECORD_BENCHMARK_H_
 #define CC_DEBUG_RASTERIZE_AND_RECORD_BENCHMARK_H_
 
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "cc/debug/micro_benchmark_controller.h"
 #include "cc/resources/picture.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace cc {
 
 class LayerTreeHost;
 class Layer;
 class RasterizeAndRecordBenchmark : public MicroBenchmark {
  public:
   explicit RasterizeAndRecordBenchmark(
       scoped_ptr<base::Value> value,
       const MicroBenchmark::DoneCallback& callback);
-  virtual ~RasterizeAndRecordBenchmark();
+  ~RasterizeAndRecordBenchmark() override;
 
   // Implements MicroBenchmark interface.
-  virtual void DidUpdateLayers(LayerTreeHost* host) override;
-  virtual void RunOnLayer(PictureLayer* layer) override;
+  void DidUpdateLayers(LayerTreeHost* host) override;
+  void RunOnLayer(PictureLayer* layer) override;
 
-  virtual scoped_ptr<MicroBenchmarkImpl> CreateBenchmarkImpl(
+  scoped_ptr<MicroBenchmarkImpl> CreateBenchmarkImpl(
       scoped_refptr<base::MessageLoopProxy> origin_loop) override;
 
  private:
   void Run(Layer* layer);
 
   void RecordRasterResults(scoped_ptr<base::Value> results);
 
   struct RecordResults {
     RecordResults();
     ~RecordResults();
@@ skipping 11 matching lines @@
   bool main_thread_benchmark_done_;
 
   LayerTreeHost* host_;
 
   base::WeakPtrFactory<RasterizeAndRecordBenchmark> weak_ptr_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_RASTERIZE_AND_RECORD_BENCHMARK_H_