Use the new versions of OnAddStream/OnRemoveStream in objc binding.

webrtc/sdk/objc/Framework/Classes/RTCPeerConnection.mm

 /*
  *  Copyright 2015 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.
  */
 
@@ skipping 108 matching lines @@
 void PeerConnectionDelegateAdapter::OnSignalingChange(
     PeerConnectionInterface::SignalingState new_state) {
   RTCSignalingState state =
       [[RTCPeerConnection class] signalingStateForNativeState:new_state];
   RTCPeerConnection *peer_connection = peer_connection_;
   [peer_connection.delegate peerConnection:peer_connection
                    didChangeSignalingState:state];
 }
 
 void PeerConnectionDelegateAdapter::OnAddStream(
-    MediaStreamInterface *stream) {
+    rtc::scoped_refptr<MediaStreamInterface> stream) {
   RTCMediaStream *mediaStream =
       [[RTCMediaStream alloc] initWithNativeMediaStream:stream];
   RTCPeerConnection *peer_connection = peer_connection_;
   [peer_connection.delegate peerConnection:peer_connection
                               didAddStream:mediaStream];
 }
 
 void PeerConnectionDelegateAdapter::OnRemoveStream(
-    MediaStreamInterface *stream) {
+    rtc::scoped_refptr<MediaStreamInterface> stream) {
   RTCMediaStream *mediaStream =
       [[RTCMediaStream alloc] initWithNativeMediaStream:stream];
   RTCPeerConnection *peer_connection = peer_connection_;
   [peer_connection.delegate peerConnection:peer_connection
                            didRemoveStream:mediaStream];
 }
 
 void PeerConnectionDelegateAdapter::OnDataChannel(
-    DataChannelInterface *data_channel) {
+    rtc::scoped_refptr<DataChannelInterface> data_channel) {
   RTCDataChannel *dataChannel =
       [[RTCDataChannel alloc] initWithNativeDataChannel:data_channel];
   RTCPeerConnection *peer_connection = peer_connection_;
   [peer_connection.delegate peerConnection:peer_connection
                         didOpenDataChannel:dataChannel];
 }
 
 void PeerConnectionDelegateAdapter::OnRenegotiationNeeded() {
   RTCPeerConnection *peer_connection = peer_connection_;
   [peer_connection.delegate peerConnectionShouldNegotiate:peer_connection];
@@ skipping 396 matching lines @@
     case RTCStatsOutputLevelDebug:
       return webrtc::PeerConnectionInterface::kStatsOutputLevelDebug;
   }
 }
 
 - (rtc::scoped_refptr<webrtc::PeerConnectionInterface>)nativePeerConnection {
   return _peerConnection;
 }
 
 @end