Move ownership of PacketRouter from CongestionController to Call.

webrtc/audio/audio_send_stream.cc

Index: webrtc/audio/audio_send_stream.cc
diff --git a/webrtc/audio/audio_send_stream.cc b/webrtc/audio/audio_send_stream.cc
index b031762b4cecd173e21766e4ab3f91c070a37fd9..179edf2d3d55393b302ee5008a4296a61d186777 100644
--- a/webrtc/audio/audio_send_stream.cc
+++ b/webrtc/audio/audio_send_stream.cc
@@ -45,6 +45,7 @@ AudioSendStream::AudioSendStream(
     const webrtc::AudioSendStream::Config& config,
     const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
     rtc::TaskQueue* worker_queue,
+    PacketRouter* packet_router,
     CongestionController* congestion_controller,
     BitrateAllocator* bitrate_allocator,
     RtcEventLog* event_log)
@@ -62,8 +63,7 @@ AudioSendStream::AudioSendStream(
   channel_proxy_->SetRtcEventLog(event_log);
   channel_proxy_->RegisterSenderCongestionControlObjects(
       congestion_controller->pacer(),
-      congestion_controller->GetTransportFeedbackObserver(),
-      congestion_controller->packet_router());
+      congestion_controller->GetTransportFeedbackObserver(), packet_router);
   channel_proxy_->SetRTCPStatus(true);
   channel_proxy_->SetLocalSSRC(config.rtp.ssrc);
   channel_proxy_->SetRTCP_CNAME(config.rtp.c_name);