Use scoped_refptr for On(Add|Remove)Stream and OnDataChannel.

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.
  */
 
@@ skipping 49 matching lines @@
   void EnsureStreamingUI();
   void AddStreams();
   cricket::VideoCapturer* OpenVideoCaptureDevice();
 
   //
   // PeerConnectionObserver implementation.
   //
 
   void OnSignalingChange(
       webrtc::PeerConnectionInterface::SignalingState new_state) override{};
-  void OnAddStream(webrtc::MediaStreamInterface* stream) override;
-  void OnRemoveStream(webrtc::MediaStreamInterface* stream) override;
-  void OnDataChannel(webrtc::DataChannelInterface* channel) override {}
+  void OnAddStream(
+      rtc::scoped_refptr<webrtc::MediaStreamInterface> stream) override;
+  void OnRemoveStream(
+      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 {}
 
   //
   // PeerConnectionClientObserver implementation.
@@ skipping 42 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_