Add Cast PLI support on sender side.

media/cast/net/cast_transport_sender_impl.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.
 
 // This class maintains a send transport for audio and video in a Cast
 // Streaming session.
 // Audio, video frames and RTCP messages are submitted to this object
 // and then packetized and paced to the underlying UDP socket.
 //
 // The hierarchy of send transport in a Cast Streaming session:
@@ skipping 48 matching lines @@
       base::TimeDelta logging_flush_interval,
       scoped_ptr<Client> client,
       scoped_ptr<PacketSender> transport,
       const scoped_refptr<base::SingleThreadTaskRunner>& transport_task_runner);
 
   ~CastTransportSenderImpl() final;
 
   // CastTransportSender implementation.
   void InitializeAudio(const CastTransportRtpConfig& config,
                        const RtcpCastMessageCallback& cast_message_cb,
-                       const RtcpRttCallback& rtt_cb) final;
+                       const RtcpRttCallback& rtt_cb,
+                       const RtcpPliCallback& pli_cb) final;
   void InitializeVideo(const CastTransportRtpConfig& config,
                        const RtcpCastMessageCallback& cast_message_cb,
-                       const RtcpRttCallback& rtt_cb) final;
+                       const RtcpRttCallback& rtt_cb,
+                       const RtcpPliCallback& pli_cb) final;
   void InsertFrame(uint32_t ssrc, const EncodedFrame& frame) final;
 
   void SendSenderReport(uint32_t ssrc,
                         base::TimeTicks current_time,
                         RtpTimeTicks current_time_as_rtp_timestamp) final;
 
   void CancelSendingFrames(uint32_t ssrc,
                            const std::vector<uint32_t>& frame_ids) final;
 
   void ResendFrameForKickstart(uint32_t ssrc, uint32_t frame_id) final;
@@ skipping 103 matching lines @@
 
   base::WeakPtrFactory<CastTransportSenderImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastTransportSenderImpl);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_CAST_TRANSPORT_SENDER_IMPL_H_