Remove original_path_id from SerializedPacket and OnPacketSent.

net/quic/core/quic_packets.h

 // 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.
 
 #ifndef NET_QUIC_CORE_QUIC_PACKETS_H_
 #define NET_QUIC_CORE_QUIC_PACKETS_H_
 
 #include <cstdint>
 #include <limits>
 #include <list>
@@ skipping 224 matching lines @@
   //  0: no padding
   //  otherwise: only pad up to num_padding_bytes bytes
   int16_t num_padding_bytes;
   QuicPathId path_id;
   QuicPacketNumber packet_number;
   QuicPacketNumberLength packet_number_length;
   EncryptionLevel encryption_level;
   bool has_ack;
   bool has_stop_waiting;
   TransmissionType transmission_type;
-  QuicPathId original_path_id;
   QuicPacketNumber original_packet_number;
 
   // Optional notifiers which will be informed when this packet has been ACKed.
   std::list<AckListenerWrapper> listeners;
 };
 
 // Deletes and clears all the frames and the packet from serialized packet.
 QUIC_EXPORT_PRIVATE void ClearSerializedPacket(
     SerializedPacket* serialized_packet);
 
 // Allocates a new char[] of size |packet.encrypted_length| and copies in
 // |packet.encrypted_buffer|.
 QUIC_EXPORT_PRIVATE char* CopyBuffer(const SerializedPacket& packet);
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_QUIC_PACKETS_H_