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

remoting/protocol/webrtc_connection_to_host.h

Index: remoting/protocol/webrtc_connection_to_host.h
diff --git a/remoting/protocol/webrtc_connection_to_host.h b/remoting/protocol/webrtc_connection_to_host.h
index 030adcc58885388d51f34e8936ce68005e63472d..755e4ce958af4a62b16c3ebe1ee2713fb397245e 100644
--- a/remoting/protocol/webrtc_connection_to_host.h
+++ b/remoting/protocol/webrtc_connection_to_host.h
@@ -23,6 +23,7 @@ namespace protocol {
 class ClientControlDispatcher;
 class ClientEventDispatcher;
 class SessionConfig;
+class WebrtcVideoRendererAdapter;
 
 class WebrtcConnectionToHost : public ConnectionToHost,
                                public Session::EventHandler,
@@ -54,6 +55,10 @@ class WebrtcConnectionToHost : public ConnectionToHost,
   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;
@@ -70,6 +75,7 @@ class WebrtcConnectionToHost : public ConnectionToHost,
 
   // Stub for incoming messages.
   ClientStub* client_stub_ = nullptr;
+  VideoRenderer* video_renderer_ = nullptr;
   ClipboardStub* clipboard_stub_ = nullptr;
 
   scoped_ptr<Session> session_;
@@ -80,6 +86,8 @@ class WebrtcConnectionToHost : public ConnectionToHost,
   ClipboardFilter clipboard_forwarder_;
   InputFilter event_forwarder_;
 
+  scoped_ptr<WebrtcVideoRendererAdapter> video_adapter_;
+
   // Internal state of the connection.
   State state_ = INITIALIZING;
   ErrorCode error_ = OK;