Standardize usage of virtual/override/final in content/

content/common/gpu/client/gpu_video_encode_accelerator_host.h

Index: content/common/gpu/client/gpu_video_encode_accelerator_host.h
diff --git a/content/common/gpu/client/gpu_video_encode_accelerator_host.h b/content/common/gpu/client/gpu_video_encode_accelerator_host.h
index 62ae1dadfd5accb845a561dc58388718fbdcae8a..f4121aed1bebac926dc05770967c1a1fe80564da 100644
--- a/content/common/gpu/client/gpu_video_encode_accelerator_host.h
+++ b/content/common/gpu/client/gpu_video_encode_accelerator_host.h
@@ -45,30 +45,29 @@ class GpuVideoEncodeAcceleratorHost
                                 CommandBufferProxyImpl* impl);
 
   // IPC::Listener implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void OnChannelError() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OnChannelError() override;
 
   // media::VideoEncodeAccelerator implementation.
-  virtual std::vector<SupportedProfile> GetSupportedProfiles() override;
-  virtual bool Initialize(media::VideoFrame::Format input_format,
-                          const gfx::Size& input_visible_size,
-                          media::VideoCodecProfile output_profile,
-                          uint32 initial_bitrate,
-                          Client* client) override;
-  virtual void Encode(const scoped_refptr<media::VideoFrame>& frame,
-                      bool force_keyframe) override;
-  virtual void UseOutputBitstreamBuffer(
-      const media::BitstreamBuffer& buffer) override;
-  virtual void RequestEncodingParametersChange(uint32 bitrate,
-                                               uint32 framerate_num) override;
-  virtual void Destroy() override;
+  std::vector<SupportedProfile> GetSupportedProfiles() override;
+  bool Initialize(media::VideoFrame::Format input_format,
+                  const gfx::Size& input_visible_size,
+                  media::VideoCodecProfile output_profile,
+                  uint32 initial_bitrate,
+                  Client* client) override;
+  void Encode(const scoped_refptr<media::VideoFrame>& frame,
+              bool force_keyframe) override;
+  void UseOutputBitstreamBuffer(const media::BitstreamBuffer& buffer) override;
+  void RequestEncodingParametersChange(uint32 bitrate,
+                                       uint32 framerate_num) override;
+  void Destroy() override;
 
   // CommandBufferProxyImpl::DeletionObserver implemetnation.
-  virtual void OnWillDeleteImpl() override;
+  void OnWillDeleteImpl() override;
 
  private:
   // Only Destroy() should be deleting |this|.
-  virtual ~GpuVideoEncodeAcceleratorHost();
+  ~GpuVideoEncodeAcceleratorHost() override;
 
   // Notify |client_| of an error.  Posts a task to avoid re-entrancy.
   void PostNotifyError(Error);