Add original_path_id to SerializedPacket and OnPacketSent. No functional change expected.

net/quic/quic_packet_creator.cc

 // Copyright (c) 2012 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 "net/quic/quic_packet_creator.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 300 matching lines @@
       packet_.encryption_level != ENCRYPTION_FORWARD_SECURE) {
     packet_.encryption_level = retransmission.encryption_level;
   }
 
   // Serialize the packet and restore packet number length state.
   for (const QuicFrame& frame : retransmission.retransmittable_frames) {
     bool success = AddFrame(frame, false);
     DCHECK(success);
   }
   SerializePacket(buffer, buffer_len);
+  packet_.original_path_id = retransmission.path_id;
   packet_.original_packet_number = retransmission.packet_number;
   packet_.transmission_type = retransmission.transmission_type;
   OnSerializedPacket();
   // Restore old values.
   packet_.packet_number_length = saved_length;
   next_packet_number_length_ = saved_next_length;
   packet_.encryption_level = default_encryption_level;
 }
 
 void QuicPacketCreator::Flush() {
@@ skipping 25 matching lines @@
   if (CanSetMaxPacketLength()) {
     SetMaxPacketLength(max_packet_length_);
   }
 }
 
 void QuicPacketCreator::ClearPacket() {
   packet_.has_ack = false;
   packet_.has_stop_waiting = false;
   packet_.has_crypto_handshake = NOT_HANDSHAKE;
   packet_.num_padding_bytes = 0;
+  packet_.original_path_id = kInvalidPathId;
   packet_.original_packet_number = 0;
   packet_.transmission_type = NOT_RETRANSMISSION;
   packet_.encrypted_buffer = nullptr;
   packet_.encrypted_length = 0;
   DCHECK(packet_.retransmittable_frames.empty());
   packet_.listeners.clear();
 }
 
 bool QuicPacketCreator::HasPendingFrames() const {
   return !queued_frames_.empty();
@@ skipping 237 matching lines @@
   // Switching path needs to update packet number length.
   UpdatePacketNumberLength(least_packet_awaited_by_peer, max_packets_in_flight);
 }
 
 bool QuicPacketCreator::IncludeNonceInPublicHeader() {
   return have_diversification_nonce_ &&
          packet_.encryption_level == ENCRYPTION_INITIAL;
 }
 
 }  // namespace net