Cast:Adding signaling and infrastructure for adjustable delay

media/cast/audio_receiver/audio_receiver.cc

Index: media/cast/audio_receiver/audio_receiver.cc
diff --git a/media/cast/audio_receiver/audio_receiver.cc b/media/cast/audio_receiver/audio_receiver.cc
index b9db5d803f8ec8c707db6f4fe7f194c04d25c850..b5c8e08c1468c76b8386b5e4377865332a446138 100644
--- a/media/cast/audio_receiver/audio_receiver.cc
+++ b/media/cast/audio_receiver/audio_receiver.cc
@@ -119,6 +119,8 @@ AudioReceiver::AudioReceiver(scoped_refptr<CastEnvironment> cast_environment,
                        audio_config.rtcp_mode, rtcp_interval_delta,
                        audio_config.feedback_ssrc, audio_config.incoming_ssrc,
                        audio_config.rtcp_c_name));
+  // Set the target delay that will be conveyed to the sender.
+  rtcp_->SetTargetDelay(target_delay_delta_);
   cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber_);
   memset(frame_id_to_rtp_timestamp_, 0, sizeof(frame_id_to_rtp_timestamp_));
 }
@@ -367,6 +369,11 @@ void AudioReceiver::IncomingPacket(scoped_ptr<Packet> packet) {
   }
 }
 
+void AudioReceiver::SetTargetDelay(base::TimeDelta target_delay) {
+  target_delay_delta_ = target_delay;
+  rtcp_->SetTargetDelay(target_delay_delta_);
+}
+
 void AudioReceiver::CastFeedback(const RtcpCastMessage& cast_message) {
   base::TimeTicks now = cast_environment_->Clock()->NowTicks();
   RtpTimestamp rtp_timestamp =