Added a callback function OnAddTrack to PeerConnectionObserver

webrtc/examples/peerconnection/client/conductor.h

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_EXAMPLES_PEERCONNECTION_CLIENT_CONDUCTOR_H_
 #define WEBRTC_EXAMPLES_PEERCONNECTION_CLIENT_CONDUCTOR_H_
 #pragma once
 
 #include <deque>
 #include <map>
 #include <set>
 #include <string>
+#include <vector>
 
 #include "webrtc/api/mediastreaminterface.h"
 #include "webrtc/api/peerconnectioninterface.h"
 #include "webrtc/examples/peerconnection/client/main_wnd.h"
 #include "webrtc/examples/peerconnection/client/peer_connection_client.h"
 
 namespace webrtc {
 class VideoCaptureModule;
 }  // namespace webrtc
 
@@ skipping 43 matching lines @@
       rtc::scoped_refptr<webrtc::MediaStreamInterface> stream) override;
   void OnDataChannel(
       rtc::scoped_refptr<webrtc::DataChannelInterface> channel) override {}
   void OnRenegotiationNeeded() override {}
   void OnIceConnectionChange(
       webrtc::PeerConnectionInterface::IceConnectionState new_state) override{};
   void OnIceGatheringChange(
       webrtc::PeerConnectionInterface::IceGatheringState new_state) override{};
   void OnIceCandidate(const webrtc::IceCandidateInterface* candidate) override;
   void OnIceConnectionReceivingChange(bool receiving) override {}
+  void OnAddTrack(rtc::scoped_refptr<webrtc::RtpReceiverInterface> receiver,
+                  std::vector<rtc::scoped_refptr<webrtc::MediaStreamInterface>>
+                      streams) override {}
 
   //
   // PeerConnectionClientObserver implementation.
   //
 
   virtual void OnSignedIn();
 
   virtual void OnDisconnected();
 
   virtual void OnPeerConnected(int id, const std::string& name);
@@ skipping 35 matching lines @@
       peer_connection_factory_;
   PeerConnectionClient* client_;
   MainWindow* main_wnd_;
   std::deque<std::string*> pending_messages_;
   std::map<std::string, rtc::scoped_refptr<webrtc::MediaStreamInterface> >
       active_streams_;
   std::string server_;
 };
 
 #endif  // WEBRTC_EXAMPLES_PEERCONNECTION_CLIENT_CONDUCTOR_H_