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

content/renderer/gpu/stream_texture_host_android.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 CONTENT_RENDERER_GPU_STREAM_TEXTURE_HOST_ANDROID_H_
 #define CONTENT_RENDERER_GPU_STREAM_TEXTURE_HOST_ANDROID_H_
 
 #include "base/memory/weak_ptr.h"
 #include "content/common/android/surface_texture_peer.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_message.h"
 
 namespace gfx {
 class Size;
 }
 
 struct GpuStreamTextureMsg_MatrixChanged_Params;
 
 namespace content {
 class GpuChannelHost;
 
 // Class for handling all the IPC messages between the GPU process and
 // StreamTextureProxy.
 class StreamTextureHost : public IPC::Listener {
  public:
   explicit StreamTextureHost(GpuChannelHost* channel);
-  virtual ~StreamTextureHost();
+  ~StreamTextureHost() override;
 
   // Listener class that is listening to the stream texture updates. It is
   // implemented by StreamTextureProxyImpl.
   class Listener {
    public:
     virtual void OnFrameAvailable() = 0;
     virtual void OnMatrixChanged(const float mtx[16]) = 0;
     virtual ~Listener() {}
   };
 
   bool BindToCurrentThread(int32 stream_id, Listener* listener);
 
   // IPC::Channel::Listener implementation:
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void OnChannelError() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OnChannelError() override;
 
  private:
   // Message handlers:
   void OnFrameAvailable();
   void OnMatrixChanged(const GpuStreamTextureMsg_MatrixChanged_Params& param);
 
   int stream_id_;
   Listener* listener_;
   scoped_refptr<GpuChannelHost> channel_;
   base::WeakPtrFactory<StreamTextureHost> weak_ptr_factory_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(StreamTextureHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_STREAM_TEXTURE_HOST_ANDROID_H_