Make the audio channel communicate network state changes to the call.

webrtc/modules/pacing/paced_sender.cc

Index: webrtc/modules/pacing/paced_sender.cc
diff --git a/webrtc/modules/pacing/paced_sender.cc b/webrtc/modules/pacing/paced_sender.cc
index 699865097985dbe896ab77739fc9a1ded12a565a..d9e5f8547f5c83472e513a251b448f957b8cd1d4 100644
--- a/webrtc/modules/pacing/paced_sender.cc
+++ b/webrtc/modules/pacing/paced_sender.cc
@@ -437,10 +437,7 @@ void PacedSender::Process() {
 }
 
 bool PacedSender::SendPacket(const paced_sender::Packet& packet) {
-  // TODO(holmer): Because of this bug issue 5307 we have to send audio
-  // packets even when the pacer is paused. Here we assume audio packets are
-  // always high priority and that they are the only high priority packets.
-  if (paused_ && packet.priority != kHighPriority)
+  if (paused_)
     return false;
   critsect_->Leave();
   const bool success = callback_->TimeToSendPacket(packet.ssrc,