Add Cast PLI support on sender side.

chrome/browser/media/cast_transport_host_filter.cc

Index: chrome/browser/media/cast_transport_host_filter.cc
diff --git a/chrome/browser/media/cast_transport_host_filter.cc b/chrome/browser/media/cast_transport_host_filter.cc
index acdcd053acdc6fe9acee031034d544ecb782c892..253b40692487e8ed5d1555cc8bb4f98277a2f786 100644
--- a/chrome/browser/media/cast_transport_host_filter.cc
+++ b/chrome/browser/media/cast_transport_host_filter.cc
@@ -107,6 +107,11 @@ void CastTransportHostFilter::SendCastMessage(
   Send(new CastMsg_RtcpCastMessage(channel_id, ssrc, cast_message));
 }
 
+void CastTransportHostFilter::SendReceivedPli(int32_t channel_id,
+                                              uint32_t ssrc) {
+  Send(new CastMsg_Pli(channel_id, ssrc));
+}
+
 void CastTransportHostFilter::OnNew(int32_t channel_id,
                                     const net::IPEndPoint& local_end_point,
                                     const net::IPEndPoint& remote_end_point,
@@ -163,13 +168,12 @@ void CastTransportHostFilter::OnInitializeAudio(
   media::cast::CastTransportSender* sender = id_map_.Lookup(channel_id);
   if (sender) {
     sender->InitializeAudio(
-        config,
-        base::Bind(&CastTransportHostFilter::SendCastMessage,
-                   weak_factory_.GetWeakPtr(),
-                   channel_id, config.ssrc),
+        config, base::Bind(&CastTransportHostFilter::SendCastMessage,
+                           weak_factory_.GetWeakPtr(), channel_id, config.ssrc),
         base::Bind(&CastTransportHostFilter::SendRtt,
-                   weak_factory_.GetWeakPtr(),
-                   channel_id, config.ssrc));
+                   weak_factory_.GetWeakPtr(), channel_id, config.ssrc),
+        base::Bind(&CastTransportHostFilter::SendReceivedPli,
+                   weak_factory_.GetWeakPtr(), channel_id, config.ssrc));
   } else {
     DVLOG(1)
         << "CastTransportHostFilter::OnInitializeAudio on non-existing channel";
@@ -182,13 +186,12 @@ void CastTransportHostFilter::OnInitializeVideo(
   media::cast::CastTransportSender* sender = id_map_.Lookup(channel_id);
   if (sender) {
     sender->InitializeVideo(
-        config,
-        base::Bind(&CastTransportHostFilter::SendCastMessage,
-                   weak_factory_.GetWeakPtr(),
-                   channel_id, config.ssrc),
+        config, base::Bind(&CastTransportHostFilter::SendCastMessage,
+                           weak_factory_.GetWeakPtr(), channel_id, config.ssrc),
         base::Bind(&CastTransportHostFilter::SendRtt,
-                   weak_factory_.GetWeakPtr(),
-                   channel_id, config.ssrc));
+                   weak_factory_.GetWeakPtr(), channel_id, config.ssrc),
+        base::Bind(&CastTransportHostFilter::SendReceivedPli,
+                   weak_factory_.GetWeakPtr(), channel_id, config.ssrc));
   } else {
     DVLOG(1)
         << "CastTransportHostFilter::OnInitializeVideo on non-existing channel";
@@ -269,13 +272,11 @@ void CastTransportHostFilter::OnSendRtcpFromRtpReceiver(
     const media::cast::SendRtcpFromRtpReceiver_Params& params) {
   media::cast::CastTransportSender* sender = id_map_.Lookup(channel_id);
   if (sender) {
-    sender->SendRtcpFromRtpReceiver(params.ssrc,
-                                    params.sender_ssrc,
-                                    params.time_data,
-                                    params.cast_message.get(),
-                                    params.target_delay,
-                                    params.rtcp_events.get(),
-                                    params.rtp_receiver_statistics.get());
+    sender->SendRtcpFromRtpReceiver(
+        params.ssrc, params.sender_ssrc, params.time_data,
+        params.cast_message.get(), params.pli_message.get(),
+        params.target_delay, params.rtcp_events.get(),
+        params.rtp_receiver_statistics.get());
   } else {
     DVLOG(1)
         << "CastTransportHostFilter::OnSendRtcpFromRtpReceiver "