Add the last_sent_packet_id to the candidate pair change signal

webrtc/p2p/quic/quictransportchannel.cc

 /*
  *  Copyright 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 373 matching lines @@
 }
 
 void QuicTransportChannel::OnRouteChange(TransportChannel* channel,
                                          const Candidate& candidate) {
   ASSERT(channel == channel_);
   SignalRouteChange(this, candidate);
 }
 
 void QuicTransportChannel::OnSelectedCandidatePairChanged(
     TransportChannel* channel,
-    CandidatePairInterface* selected_candidate_pair) {
+    CandidatePairInterface* selected_candidate_pair,
+    int last_sent_packet_id) {
   ASSERT(channel == channel_);
-  SignalSelectedCandidatePairChanged(this, selected_candidate_pair);
+  SignalSelectedCandidatePairChanged(this, selected_candidate_pair,
+                                     last_sent_packet_id);
 }
 
 void QuicTransportChannel::OnConnectionRemoved(TransportChannelImpl* channel) {
   ASSERT(channel == channel_);
   SignalConnectionRemoved(this);
 }
 
 bool QuicTransportChannel::MaybeStartQuic() {
   if (!channel_->writable()) {
     LOG_J(LS_ERROR, this) << "Couldn't start QUIC handshake.";
@@ skipping 154 matching lines @@
   quic_->connection()->OnCanWrite();
 }
 
 void QuicTransportChannel::set_quic_state(QuicTransportState state) {
   LOG_J(LS_VERBOSE, this) << "set_quic_state from:" << quic_state_ << " to "
                           << state;
   quic_state_ = state;
 }
 
 }  // namespace cricket