Add Cast PLI support on sender side.

media/cast/net/rtcp/rtcp_builder.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_CAST_NET_RTCP_RTCP_BUILDER_H_
 #define MEDIA_CAST_NET_RTCP_RTCP_BUILDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 30 matching lines @@
   void PatchLengthField();
   void AddRR(const RtcpReportBlock* report_block);
   void AddReportBlocks(const RtcpReportBlock& report_block);
   void AddRrtr(const RtcpReceiverReferenceTimeReport* rrtr);
   void AddCast(const RtcpCastMessage* cast_message,
                base::TimeDelta target_delay);
   void AddSR(const RtcpSenderInfo& sender_info);
   void AddDlrrRb(const RtcpDlrrReportBlock& dlrr);
   void AddReceiverLog(
       const ReceiverRtcpEventSubscriber::RtcpEvents& rtcp_events);
+  // Add PLI (picture loss indicator) in Rtcp.
+  void AddPli(const RtcpCastMessage* cast_message);
 
   bool GetRtcpReceiverLogMessage(
       const ReceiverRtcpEventSubscriber::RtcpEvents& rtcp_events,
       RtcpReceiverLogMessage* receiver_log_message,
       size_t* total_number_of_messages_to_send);
 
   void Start();
   PacketRef Finish();
 
   base::BigEndianWriter writer_;
   const uint32_t ssrc_;
   char* ptr_of_length_;
   PacketRef packet_;
 
   DISALLOW_COPY_AND_ASSIGN(RtcpBuilder);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_RTCP_RTCP_SENDER_H_