Use separate rtp module lists for send and receive in PacketRouter.

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 25f44c1c66fcbaccc7543121971f0c9cda6dc4e1..985dda2a1a9289b503193d69be2de3ccccfdc678 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -125,6 +125,12 @@ class RtpPacketSenderProxy : public RtpPacketSender {
     rtp_packet_sender_ = rtp_packet_sender;
   }
 
+  bool HasPacketSender() const {
+    RTC_DCHECK(thread_checker_.CalledOnValidThread());
+    rtc::CritScope lock(&crit_);
+    return rtp_packet_sender_ != nullptr;
+  }
+
   // Implements RtpPacketSender.
   void InsertPacket(Priority priority,
                     uint32_t ssrc,
@@ -2922,6 +2928,9 @@ void Channel::SetCongestionControlObjects(
     RtpPacketSender* rtp_packet_sender,
     TransportFeedbackObserver* transport_feedback_observer,
     PacketRouter* packet_router) {
+  bool sender = rtp_packet_sender != nullptr ||
+                (rtp_packet_sender_proxy_.get() &&
+                 rtp_packet_sender_proxy_->HasPacketSender());
   RTC_DCHECK(packet_router != nullptr || packet_router_ != nullptr);
   if (transport_feedback_observer) {
     RTC_DCHECK(feedback_observer_proxy_.get());
@@ -2937,7 +2946,7 @@ void Channel::SetCongestionControlObjects(
   }
   _rtpRtcpModule->SetStorePacketsStatus(rtp_packet_sender != nullptr, 600);
   if (packet_router != nullptr) {
-    packet_router->AddRtpModule(_rtpRtcpModule.get());
+    packet_router->AddRtpModule(_rtpRtcpModule.get(), sender);
   } else {
     packet_router_->RemoveRtpModule(_rtpRtcpModule.get());
   }