Implement client-side video stream support for WebRTC-based protocol.

remoting/protocol/webrtc_connection_to_client.h

Index: remoting/protocol/webrtc_connection_to_client.h
diff --git a/remoting/protocol/webrtc_connection_to_client.h b/remoting/protocol/webrtc_connection_to_client.h
index 178637463376ec846a1aebf40ea45e72cf75deab..06fadd67b2610e9c9bacb3f9e0cabcf6f5acab9a 100644
--- a/remoting/protocol/webrtc_connection_to_client.h
+++ b/remoting/protocol/webrtc_connection_to_client.h
@@ -54,6 +54,10 @@ class WebrtcConnectionToClient : public ConnectionToClient,
   void OnWebrtcTransportConnecting() override;
   void OnWebrtcTransportConnected() override;
   void OnWebrtcTransportError(ErrorCode error) override;
+  void OnWebrtcTransportMediaStreamAdded(
+      scoped_refptr<webrtc::MediaStreamInterface> stream) override;
+  void OnWebrtcTransportMediaStreamRemoved(
+      scoped_refptr<webrtc::MediaStreamInterface> stream) override;
 
   // ChannelDispatcherBase::EventHandler interface.
   void OnChannelInitialized(ChannelDispatcherBase* channel_dispatcher) override;