SignalPacketReceived should pass packet as a pointer instead of a non-const reference.

webrtc/pc/channel.h

 /*
  *  Copyright 2004 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 253 matching lines @@
                     size_t len);
   bool SendPacket(bool rtcp,
                   rtc::CopyOnWriteBuffer* packet,
                   const rtc::PacketOptions& options);
 
   bool WantsPacket(bool rtcp, const rtc::CopyOnWriteBuffer* packet);
   void HandlePacket(bool rtcp, rtc::CopyOnWriteBuffer* packet,
                     const rtc::PacketTime& packet_time);
   // TODO(zstein): packet can be const once the RtpTransport handles protection.
   virtual void OnPacketReceived(bool rtcp,
-                                rtc::CopyOnWriteBuffer& packet,
+                                rtc::CopyOnWriteBuffer* packet,
                                 const rtc::PacketTime& packet_time);
   void ProcessPacket(bool rtcp,
                      const rtc::CopyOnWriteBuffer& packet,
                      const rtc::PacketTime& packet_time);
 
   void EnableMedia_w();
   void DisableMedia_w();
 
   // Performs actions if the RTP/RTCP writable state changed. This should
   // be called whenever a channel's writable state changes or when RTCP muxing
@@ skipping 213 matching lines @@
   webrtc::RtpParameters GetRtpSendParameters_w(uint32_t ssrc) const;
   bool SetRtpSendParameters_w(uint32_t ssrc, webrtc::RtpParameters parameters);
   webrtc::RtpParameters GetRtpReceiveParameters_w(uint32_t ssrc) const;
   bool SetRtpReceiveParameters_w(uint32_t ssrc,
                                  webrtc::RtpParameters parameters);
   cricket::MediaType media_type() override { return cricket::MEDIA_TYPE_AUDIO; }
 
  private:
   // overrides from BaseChannel
   void OnPacketReceived(bool rtcp,
-                        rtc::CopyOnWriteBuffer& packet,
+                        rtc::CopyOnWriteBuffer* packet,
                         const rtc::PacketTime& packet_time) override;
   void UpdateMediaSendRecvState_w() override;
   const ContentInfo* GetFirstContent(const SessionDescription* sdesc) override;
   bool SetLocalContent_w(const MediaContentDescription* content,
                          ContentAction action,
                          std::string* error_desc) override;
   bool SetRemoteContent_w(const MediaContentDescription* content,
                           ContentAction action,
                           std::string* error_desc) override;
   void HandleEarlyMediaTimeout();
@@ skipping 209 matching lines @@
   // SetSendParameters.
   DataSendParameters last_send_params_;
   // Last DataRecvParameters sent down to the media_channel() via
   // SetRecvParameters.
   DataRecvParameters last_recv_params_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_PC_CHANNEL_H_