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

remoting/protocol/webrtc_connection_to_client.cc

Index: remoting/protocol/webrtc_connection_to_client.cc
diff --git a/remoting/protocol/webrtc_connection_to_client.cc b/remoting/protocol/webrtc_connection_to_client.cc
index 1fbbad117d954f4391ba1a528da9fb882d78fb73..1c23e2ddba0d17b069aa1fe1faa0b98ce278c28c 100644
--- a/remoting/protocol/webrtc_connection_to_client.cc
+++ b/remoting/protocol/webrtc_connection_to_client.cc
@@ -157,6 +157,14 @@ void WebrtcConnectionToClient::OnWebrtcTransportError(ErrorCode error) {
   Disconnect(error);
 }
 
+void WebrtcConnectionToClient::OnWebrtcTransportMediaStreamAdded(
+    scoped_refptr<webrtc::MediaStreamInterface> stream) {
+  LOG(WARNING) << "The client created an unexpected media stream.";
+}
+
+void WebrtcConnectionToClient::OnWebrtcTransportMediaStreamRemoved(
+    scoped_refptr<webrtc::MediaStreamInterface> stream) {}
+
 void WebrtcConnectionToClient::OnChannelInitialized(
     ChannelDispatcherBase* channel_dispatcher) {
   DCHECK(thread_checker_.CalledOnValidThread());