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

content/common/gpu/media/android_video_decode_accelerator.h

Index: content/common/gpu/media/android_video_decode_accelerator.h
diff --git a/content/common/gpu/media/android_video_decode_accelerator.h b/content/common/gpu/media/android_video_decode_accelerator.h
index 2b41925af47abd2cb04b46d97262b6f4b45502cf..ae299c83f13b0249dcc5b619622141ffd4a996cd 100644
--- a/content/common/gpu/media/android_video_decode_accelerator.h
+++ b/content/common/gpu/media/android_video_decode_accelerator.h
@@ -37,16 +37,15 @@ class CONTENT_EXPORT AndroidVideoDecodeAccelerator
       const base::Callback<bool(void)>& make_context_current);
 
   // media::VideoDecodeAccelerator implementation.
-  virtual bool Initialize(media::VideoCodecProfile profile,
-                          Client* client) override;
-  virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
-  virtual void AssignPictureBuffers(
+  bool Initialize(media::VideoCodecProfile profile, Client* client) override;
+  void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
+  void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& buffers) override;
-  virtual void ReusePictureBuffer(int32 picture_buffer_id) override;
-  virtual void Flush() override;
-  virtual void Reset() override;
-  virtual void Destroy() override;
-  virtual bool CanDecodeOnIOThread() override;
+  void ReusePictureBuffer(int32 picture_buffer_id) override;
+  void Flush() override;
+  void Reset() override;
+  void Destroy() override;
+  bool CanDecodeOnIOThread() override;
 
  private:
   enum State {
@@ -56,7 +55,7 @@ class CONTENT_EXPORT AndroidVideoDecodeAccelerator
 
   static const base::TimeDelta kDecodePollDelay;
 
-  virtual ~AndroidVideoDecodeAccelerator();
+  ~AndroidVideoDecodeAccelerator() override;
 
   // Configures |media_codec_| with the given codec parameters from the client.
   bool ConfigureMediaCodec();