Add GUARDED_BY's in FlexfecReceiver.

webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 31 matching lines @@
       last_recovered_packet_ms_(-1) {
   // It's OK to create this object on a different thread/task queue than
   // the one used during main operation.
   sequence_checker_.Detach();
 }
 
 FlexfecReceiver::~FlexfecReceiver() = default;
 
 bool FlexfecReceiver::AddAndProcessReceivedPacket(const uint8_t* packet,
                                                   size_t packet_length) {
-  RTC_DCHECK(sequence_checker_.CalledSequentially());
-
+  RTC_DCHECK_CALLED_SEQUENTIALLY(&sequence_checker_);
   if (!AddReceivedPacket(packet, packet_length)) {
     return false;
   }
   return ProcessReceivedPackets();
 }
 
 FecPacketCounter FlexfecReceiver::GetPacketCounter() const {
-  RTC_DCHECK(sequence_checker_.CalledSequentially());
+  RTC_DCHECK_CALLED_SEQUENTIALLY(&sequence_checker_);
   return packet_counter_;
 }
 
 bool FlexfecReceiver::AddReceivedPacket(const uint8_t* packet,
                                         size_t packet_length) {
-  RTC_DCHECK(sequence_checker_.CalledSequentially());
+  RTC_DCHECK_CALLED_SEQUENTIALLY(&sequence_checker_);
 
   // RTP packets with a full base header (12 bytes), but without payload,
   // could conceivably be useful in the decoding. Therefore we check
   // with a strict inequality here.
   if (packet_length < kRtpHeaderSize) {
     LOG(LS_WARNING) << "Truncated packet, discarding.";
     return false;
   }
 
   // TODO(brandtr): Consider how to handle received FlexFEC packets and
@@ skipping 45 matching lines @@
 // Note that the implementation of this member function and the implementation
 // in UlpfecReceiver::ProcessReceivedFec() are slightly different.
 // This implementation only returns _recovered_ media packets through the
 // callback, whereas the implementation in UlpfecReceiver returns _all inserted_
 // media packets through the callback. The latter behaviour makes sense
 // for ULPFEC, since the ULPFEC receiver is owned by the RtpStreamReceiver.
 // Here, however, the received media pipeline is more decoupled from the
 // FlexFEC decoder, and we therefore do not interfere with the reception
 // of non-recovered media packets.
 bool FlexfecReceiver::ProcessReceivedPackets() {
-  RTC_DCHECK(sequence_checker_.CalledSequentially());
+  RTC_DCHECK_CALLED_SEQUENTIALLY(&sequence_checker_);
 
   // Decode.
   if (!received_packets_.empty()) {
     if (erasure_code_->DecodeFec(&received_packets_, &recovered_packets_) !=
         0) {
       return false;
     }
   }
   // Return recovered packets through callback.
   for (const auto& recovered_packet : recovered_packets_) {
@@ skipping 13 matching lines @@
           ForwardErrorCorrection::ParseSsrc(recovered_packet->pkt->data);
       LOG(LS_INFO) << "Recovered media packet with SSRC: " << media_ssrc
                    << " from FlexFEC stream with SSRC: " << ssrc_ << ".";
       last_recovered_packet_ms_ = now_ms;
     }
   }
   return true;
 }
 
 }  // namespace webrtc