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

content/common/gpu/media/android_video_encode_accelerator.h

Index: content/common/gpu/media/android_video_encode_accelerator.h
diff --git a/content/common/gpu/media/android_video_encode_accelerator.h b/content/common/gpu/media/android_video_encode_accelerator.h
index a587f104041f4cb6aea0cc580ca3cc235488b71e..7f2f4c01931fe3ad9d6e81ac1a877e25cf8ed227 100644
--- a/content/common/gpu/media/android_video_encode_accelerator.h
+++ b/content/common/gpu/media/android_video_encode_accelerator.h
@@ -32,23 +32,22 @@ class CONTENT_EXPORT AndroidVideoEncodeAccelerator
     : public media::VideoEncodeAccelerator {
  public:
   AndroidVideoEncodeAccelerator();
-  virtual ~AndroidVideoEncodeAccelerator();
+  ~AndroidVideoEncodeAccelerator() override;
 
   // media::VideoEncodeAccelerator implementation.
-  virtual std::vector<media::VideoEncodeAccelerator::SupportedProfile>
-      GetSupportedProfiles() override;
-  virtual bool Initialize(media::VideoFrame::Format 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) override;
-  virtual void Destroy() override;
+  std::vector<media::VideoEncodeAccelerator::SupportedProfile>
+  GetSupportedProfiles() override;
+  bool Initialize(media::VideoFrame::Format 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) override;
+  void Destroy() override;
 
  private:
   enum {