Standardize usage of virtual/override/final in remoting/

remoting/host/video_frame_recorder_host_extension.cc

Index: remoting/host/video_frame_recorder_host_extension.cc
diff --git a/remoting/host/video_frame_recorder_host_extension.cc b/remoting/host/video_frame_recorder_host_extension.cc
index e405cef926e9a6adcf02666c9f77f4dea58fab04..61bd74609d20c9a8d10ad32fc6962cfa54e378ca 100644
--- a/remoting/host/video_frame_recorder_host_extension.cc
+++ b/remoting/host/video_frame_recorder_host_extension.cc
@@ -28,15 +28,14 @@ const char kVideoRecorderType[] = "video-recorder";
 class VideoFrameRecorderHostExtensionSession : public HostExtensionSession {
  public:
   explicit VideoFrameRecorderHostExtensionSession(int64_t max_content_bytes);
-  virtual ~VideoFrameRecorderHostExtensionSession();
+  ~VideoFrameRecorderHostExtensionSession() override;
 
   // remoting::HostExtensionSession interface.
-  virtual void OnCreateVideoEncoder(scoped_ptr<VideoEncoder>* encoder) override;
-  virtual bool ModifiesVideoPipeline() const override;
-  virtual bool OnExtensionMessage(
-      ClientSessionControl* client_session_control,
-      protocol::ClientStub* client_stub,
-      const protocol::ExtensionMessage& message) override;
+  void OnCreateVideoEncoder(scoped_ptr<VideoEncoder>* encoder) override;
+  bool ModifiesVideoPipeline() const override;
+  bool OnExtensionMessage(ClientSessionControl* client_session_control,
+                          protocol::ClientStub* client_stub,
+                          const protocol::ExtensionMessage& message) override;
 
  private:
   // Handlers for the different frame recorder extension message types.