Cast: Log sender side packet events.

media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc

Index: media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc
diff --git a/media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc b/media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc
index d4386760033cb5a1b7f3c52fbd380962971da0f3..20cc333898be474928bd6be9a0cf5f6bb231a50a 100644
--- a/media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc
+++ b/media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc
@@ -31,10 +31,14 @@ RtpPacketizerConfig::~RtpPacketizerConfig() {}
 
 RtpPacketizer::RtpPacketizer(PacedSender* const transport,
                              PacketStorage* packet_storage,
-                             RtpPacketizerConfig rtp_packetizer_config)
+                             RtpPacketizerConfig rtp_packetizer_config,
+                             base::TickClock* clock,
+                             LoggingImpl* logging)
     : config_(rtp_packetizer_config),
       transport_(transport),
       packet_storage_(packet_storage),
+      clock_(clock),
+      logging_(logging),
       sequence_number_(config_.sequence_number),
       rtp_timestamp_(0),
       packet_id_(0),
@@ -145,6 +149,11 @@ void RtpPacketizer::Cast(bool is_key,
   }
   DCHECK(packet_id_ == num_packets) << "Invalid state";
 
+  logging_->InsertPacketListEvent(
+      clock_->NowTicks(),
+      config_.audio ? kAudioPacketSentToPacer : kVideoPacketSentToPacer,
+      packets);
+
   // Send to network.
   transport_->SendPackets(packets);