Update {virtual,override} to follow C++11 style in media.

media/renderers/mock_gpu_video_accelerator_factories.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 MEDIA_RENDERERS_MOCK_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
 #define MEDIA_RENDERERS_MOCK_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "media/renderers/gpu_video_accelerator_factories.h"
@@ skipping 28 matching lines @@
   MOCK_METHOD1(DeleteTexture, void(uint32 texture_id));
   MOCK_METHOD1(WaitSyncPoint, void(uint32 sync_point));
   MOCK_METHOD0(GetTaskRunner, scoped_refptr<base::SingleThreadTaskRunner>());
   MOCK_METHOD0(GetVideoDecodeAcceleratorSupportedProfiles,
                VideoDecodeAccelerator::SupportedProfiles());
   MOCK_METHOD0(GetVideoEncodeAcceleratorSupportedProfiles,
                VideoEncodeAccelerator::SupportedProfiles());
 
   scoped_ptr<base::SharedMemory> CreateSharedMemory(size_t size) override;
 
-  virtual scoped_ptr<VideoDecodeAccelerator> CreateVideoDecodeAccelerator()
-      override;
+  scoped_ptr<VideoDecodeAccelerator> CreateVideoDecodeAccelerator() override;
 
-  virtual scoped_ptr<VideoEncodeAccelerator> CreateVideoEncodeAccelerator()
-      override;
+  scoped_ptr<VideoEncodeAccelerator> CreateVideoEncodeAccelerator() override;
 
  private:
-  virtual ~MockGpuVideoAcceleratorFactories();
+  ~MockGpuVideoAcceleratorFactories() override;
 
   DISALLOW_COPY_AND_ASSIGN(MockGpuVideoAcceleratorFactories);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_MOCK_GPU_VIDEO_ACCELERATOR_FACTORIES_H_