Standardize usage of virtual/override/final in remoting/

remoting/protocol/host_video_dispatcher.h

Index: remoting/protocol/host_video_dispatcher.h
diff --git a/remoting/protocol/host_video_dispatcher.h b/remoting/protocol/host_video_dispatcher.h
index 9e319c2a24f9a8ff58d623ad2586e7bf331fa953..36b9c69fbb9909e2cea6f5a2c8d07ca5e56c80c0 100644
--- a/remoting/protocol/host_video_dispatcher.h
+++ b/remoting/protocol/host_video_dispatcher.h
@@ -18,15 +18,15 @@ namespace protocol {
 class HostVideoDispatcher : public ChannelDispatcherBase, public VideoStub {
  public:
   HostVideoDispatcher();
-  virtual ~HostVideoDispatcher();
+  ~HostVideoDispatcher() override;
 
   // VideoStub interface.
-  virtual void ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
-                                  const base::Closure& done) override;
+  void ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
+                          const base::Closure& done) override;
 
  protected:
   // ChannelDispatcherBase overrides.
-  virtual void OnInitialized() override;
+  void OnInitialized() override;
 
  private:
   BufferedSocketWriter writer_;