Add Cast PLI support on sender side.

media/cast/receiver/frame_receiver.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/receiver/frame_receiver.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/big_endian.h"
@@ skipping 179 matching lines @@
   ack_sent_event->type = FRAME_ACK_SENT;
   ack_sent_event->media_type = event_media_type_;
   ack_sent_event->rtp_timestamp = rtp_timestamp;
   ack_sent_event->frame_id = cast_message.ack_frame_id;
   cast_environment_->logger()->DispatchFrameEvent(std::move(ack_sent_event));
 
   ReceiverRtcpEventSubscriber::RtcpEvents rtcp_events;
   event_subscriber_.GetRtcpEventsWithRedundancy(&rtcp_events);
   transport_->SendRtcpFromRtpReceiver(
       rtcp_.local_ssrc(), rtcp_.remote_ssrc(), CreateRtcpTimeData(now),
-      &cast_message, target_playout_delay_, &rtcp_events, NULL);
+      &cast_message, nullptr, target_playout_delay_, &rtcp_events, nullptr);
 }
 
 void FrameReceiver::EmitAvailableEncodedFrames() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
 
   while (!frame_request_queue_.empty()) {
     // Attempt to peek at the next completed frame from the |framer_|.
     // TODO(miu): We should only be peeking at the metadata, and not copying the
     // payload yet!  Or, at least, peek using a StringPiece instead of a copy.
     scoped_ptr<EncodedFrame> encoded_frame(
@@ skipping 132 matching lines @@
       base::Bind(&FrameReceiver::SendNextRtcpReport,
                  weak_factory_.GetWeakPtr()),
       base::TimeDelta::FromMilliseconds(kRtcpReportIntervalMs));
 }
 
 void FrameReceiver::SendNextRtcpReport() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   const base::TimeTicks now = cast_environment_->Clock()->NowTicks();
   RtpReceiverStatistics stats = stats_.GetStatistics();
   transport_->SendRtcpFromRtpReceiver(rtcp_.local_ssrc(), rtcp_.remote_ssrc(),
-                                      CreateRtcpTimeData(now), NULL,
-                                      base::TimeDelta(), NULL, &stats);
+                                      CreateRtcpTimeData(now), nullptr, nullptr,
+                                      base::TimeDelta(), nullptr, &stats);
   ScheduleNextRtcpReport();
 }
 
 }  // namespace cast
 }  // namespace media