Let PacketRouter separate send and receive modules.

webrtc/voice_engine/channel.cc

Index: webrtc/voice_engine/channel.cc
diff --git a/webrtc/voice_engine/channel.cc b/webrtc/voice_engine/channel.cc
index d2b30ca8f7d41c07b7ea406e6f26a84d59699ca5..fa8052ea4f6fb33f1b3fe70e4f9b203547dad30a 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -2384,28 +2384,34 @@ void Channel::RegisterSenderCongestionControlObjects(
   seq_num_allocator_proxy_->SetSequenceNumberAllocator(packet_router);
   rtp_packet_sender_proxy_->SetPacketSender(rtp_packet_sender);
   _rtpRtcpModule->SetStorePacketsStatus(true, 600);
-  packet_router->AddRtpModule(_rtpRtcpModule.get());
+  packet_router->AddSendRtpModule(_rtpRtcpModule.get());
   packet_router_ = packet_router;
 }
 
 void Channel::RegisterReceiverCongestionControlObjects(
     PacketRouter* packet_router) {
   RTC_DCHECK(packet_router && !packet_router_);
-  packet_router->AddRtpModule(_rtpRtcpModule.get());
+  packet_router->AddReceiveRtpModule(_rtpRtcpModule.get());
   packet_router_ = packet_router;
 }
 
-void Channel::ResetCongestionControlObjects() {
+void Channel::ResetSenderCongestionControlObjects() {
   RTC_DCHECK(packet_router_);
   _rtpRtcpModule->SetStorePacketsStatus(false, 600);
   rtcp_observer_->SetBandwidthObserver(nullptr);
   feedback_observer_proxy_->SetTransportFeedbackObserver(nullptr);
   seq_num_allocator_proxy_->SetSequenceNumberAllocator(nullptr);
-  packet_router_->RemoveRtpModule(_rtpRtcpModule.get());
+  packet_router_->RemoveSendRtpModule(_rtpRtcpModule.get());
   packet_router_ = nullptr;
   rtp_packet_sender_proxy_->SetPacketSender(nullptr);
 }
 
+void Channel::ResetReceiverCongestionControlObjects() {
+  RTC_DCHECK(packet_router_);
+  packet_router_->RemoveReceiveRtpModule(_rtpRtcpModule.get());
+  packet_router_ = nullptr;
+}
+
 void Channel::SetRTCPStatus(bool enable) {
   WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
                "Channel::SetRTCPStatus()");