Add Cast PLI support on sender side.

chrome/renderer/media/cast_transport_sender_ipc.cc

Index: chrome/renderer/media/cast_transport_sender_ipc.cc
diff --git a/chrome/renderer/media/cast_transport_sender_ipc.cc b/chrome/renderer/media/cast_transport_sender_ipc.cc
index da614b8fb3079e28dccacfa662779507444ddfac..1c37d7d6ff8be91f573bc1eb13fe1fc923ad96ea 100644
--- a/chrome/renderer/media/cast_transport_sender_ipc.cc
+++ b/chrome/renderer/media/cast_transport_sender_ipc.cc
@@ -45,18 +45,22 @@ CastTransportSenderIPC::~CastTransportSenderIPC() {
 void CastTransportSenderIPC::InitializeAudio(
     const media::cast::CastTransportRtpConfig& config,
     const media::cast::RtcpCastMessageCallback& cast_message_cb,
-    const media::cast::RtcpRttCallback& rtt_cb) {
+    const media::cast::RtcpRttCallback& rtt_cb,
+    const media::cast::RtcpPliCallback& pli_cb) {
   clients_[config.ssrc].cast_message_cb = cast_message_cb;
   clients_[config.ssrc].rtt_cb = rtt_cb;
+  clients_[config.ssrc].pli_cb = pli_cb;
   Send(new CastHostMsg_InitializeAudio(channel_id_, config));
 }
 
 void CastTransportSenderIPC::InitializeVideo(
     const media::cast::CastTransportRtpConfig& config,
     const media::cast::RtcpCastMessageCallback& cast_message_cb,
-    const media::cast::RtcpRttCallback& rtt_cb) {
+    const media::cast::RtcpRttCallback& rtt_cb,
+    const media::cast::RtcpPliCallback& pli_cb) {
   clients_[config.ssrc].cast_message_cb = cast_message_cb;
   clients_[config.ssrc].rtt_cb = rtt_cb;
+  clients_[config.ssrc].pli_cb = pli_cb;
   Send(new CastHostMsg_InitializeVideo(channel_id_, config));
 }
 
@@ -182,6 +186,17 @@ void CastTransportSenderIPC::OnRtcpCastMessage(
   it->second.cast_message_cb.Run(cast_message);
 }
 
+void CastTransportSenderIPC::OnReceivedPli(uint32_t ssrc) {
+  ClientMap::iterator it = clients_.find(ssrc);
+  if (it == clients_.end()) {
+    LOG(ERROR) << "Received picture loss indicator from for unknown SSRC: "
+               << ssrc;
+    return;
+  }
+  if (!it->second.pli_cb.is_null())
+    it->second.pli_cb.Run();
+}
+
 void CastTransportSenderIPC::OnReceivedPacket(
     const media::cast::Packet& packet) {
   if (!packet_callback_.is_null()) {