Add path_id to SerializedPacket. No functional change.

net/quic/congestion_control/tcp_loss_algorithm_test.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 "net/quic/congestion_control/tcp_loss_algorithm.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 18 matching lines @@
                          QuicTime::Delta::Zero(),
                          clock_.Now());
   }
 
   ~TcpLossAlgorithmTest() override {
     STLDeleteElements(&packets_);
   }
 
   void SendDataPacket(QuicPacketNumber packet_number) {
     packets_.push_back(new QuicEncryptedPacket(nullptr, kDefaultLength));
-    SerializedPacket packet(packet_number, PACKET_1BYTE_PACKET_NUMBER,
-                            packets_.back(), 0, new RetransmittableFrames(),
-                            false, false);
+    SerializedPacket packet(kDefaultPathId, packet_number,
+                            PACKET_1BYTE_PACKET_NUMBER, packets_.back(), 0,
+                            new RetransmittableFrames(), false, false);
     unacked_packets_.AddSentPacket(&packet, 0, NOT_RETRANSMISSION, clock_.Now(),
                                    1000, true);
   }
 
   void VerifyLosses(QuicPacketNumber largest_observed,
                     QuicPacketNumber* losses_expected,
                     size_t num_losses) {
     PacketNumberSet lost_packets = loss_algorithm_.DetectLostPackets(
         unacked_packets_, clock_.Now(), largest_observed, rtt_stats_);
     EXPECT_EQ(num_losses, lost_packets.size());
@@ skipping 154 matching lines @@
   unacked_packets_.IncreaseLargestObserved(2);
   unacked_packets_.RemoveFromInFlight(2);
   unacked_packets_.NackPacket(1, 1);
   QuicPacketNumber lost[] = {1};
   VerifyLosses(2, lost, arraysize(lost));
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net