Standardize usage of virtual/override/final in remoting/

remoting/host/video_frame_recorder_host_extension.h

Index: remoting/host/video_frame_recorder_host_extension.h
diff --git a/remoting/host/video_frame_recorder_host_extension.h b/remoting/host/video_frame_recorder_host_extension.h
index ff2ff4e31a8ed580572c5d6027b0a338881c335c..f35ec023ca267c83bf77987a0f2468dde9454e89 100644
--- a/remoting/host/video_frame_recorder_host_extension.h
+++ b/remoting/host/video_frame_recorder_host_extension.h
@@ -16,14 +16,14 @@ namespace remoting {
 class VideoFrameRecorderHostExtension : public HostExtension {
  public:
   VideoFrameRecorderHostExtension();
-  virtual ~VideoFrameRecorderHostExtension();
+  ~VideoFrameRecorderHostExtension() override;
 
   // Sets the maximum number of bytes that each session may record.
   void SetMaxContentBytes(int64_t max_content_bytes);
 
   // remoting::HostExtension interface.
-  virtual std::string capability() const override;
-  virtual scoped_ptr<HostExtensionSession> CreateExtensionSession(
+  std::string capability() const override;
+  scoped_ptr<HostExtensionSession> CreateExtensionSession(
       ClientSessionControl* client_session,
       protocol::ClientStub* client_stub) override;