Add Cast PLI support on sender side.

media/cast/net/rtcp/rtcp_defines.cc

 // 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.
 
 #include "media/cast/net/rtcp/rtcp_defines.h"
 
 #include "media/cast/logging/logging_defines.h"
 
 namespace media {
 namespace cast {
 
 RtcpCastMessage::RtcpCastMessage(uint32_t ssrc)
     : media_ssrc(ssrc), ack_frame_id(0u), target_delay_ms(0) {}
 RtcpCastMessage::RtcpCastMessage()
     : media_ssrc(0), ack_frame_id(0u), target_delay_ms(0) {}
 RtcpCastMessage::~RtcpCastMessage() {}
 
+RtcpPliMessage::RtcpPliMessage(uint32_t ssrc) : sender_ssrc(ssrc) {}
+RtcpPliMessage::RtcpPliMessage() : sender_ssrc(0) {}
+RtcpPliMessage::~RtcpPliMessage() {}
+
 RtcpReceiverEventLogMessage::RtcpReceiverEventLogMessage()
     : type(UNKNOWN), packet_id(0u) {}
 RtcpReceiverEventLogMessage::~RtcpReceiverEventLogMessage() {}
 
 RtcpReceiverFrameLogMessage::RtcpReceiverFrameLogMessage(RtpTimeTicks timestamp)
     : rtp_timestamp_(timestamp) {}
 RtcpReceiverFrameLogMessage::~RtcpReceiverFrameLogMessage() {}
 
 RtcpReceiverReferenceTimeReport::RtcpReceiverReferenceTimeReport()
     : remote_ssrc(0u), ntp_seconds(0u), ntp_fraction(0u) {}
 RtcpReceiverReferenceTimeReport::~RtcpReceiverReferenceTimeReport() {}
 
 RtcpEvent::RtcpEvent() : type(UNKNOWN), packet_id(0u) {}
 RtcpEvent::~RtcpEvent() {}
 
 RtpReceiverStatistics::RtpReceiverStatistics() :
     fraction_lost(0),
     cumulative_lost(0),
     extended_high_sequence_number(0),
     jitter(0) {}
 
 SendRtcpFromRtpReceiver_Params::SendRtcpFromRtpReceiver_Params()
     : ssrc(0),
       sender_ssrc(0) {}
 
 SendRtcpFromRtpReceiver_Params::~SendRtcpFromRtpReceiver_Params() {}
 
 }  // namespace cast
 }  // namespace media