Standardize usage of virtual/override/final in content/renderer/

content/renderer/pepper/video_decoder_shim.h

Index: content/renderer/pepper/video_decoder_shim.h
diff --git a/content/renderer/pepper/video_decoder_shim.h b/content/renderer/pepper/video_decoder_shim.h
index 35a61465b6a290d3d4571d5baac56b132e07a1b5..42335c1f87c1dd5e536c2462d53c9b24b56c48f0 100644
--- a/content/renderer/pepper/video_decoder_shim.h
+++ b/content/renderer/pepper/video_decoder_shim.h
@@ -50,19 +50,18 @@ class PepperVideoDecoderHost;
 class VideoDecoderShim : public media::VideoDecodeAccelerator {
  public:
   explicit VideoDecoderShim(PepperVideoDecoderHost* host);
-  virtual ~VideoDecoderShim();
+  ~VideoDecoderShim() override;
 
   // media::VideoDecodeAccelerator implementation.
-  virtual bool Initialize(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client) override;
-  virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
-  virtual void AssignPictureBuffers(
+  bool Initialize(media::VideoCodecProfile profile,
+                  media::VideoDecodeAccelerator::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;
+  void ReusePictureBuffer(int32 picture_buffer_id) override;
+  void Flush() override;
+  void Reset() override;
+  void Destroy() override;
 
  private:
   enum State {