relnote: Add varz peer_ip_changes and successful_peer_ip_migrations (no

net/quic/quic_connection.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_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 1445 matching lines @@
   }
 }
 
 bool QuicConnection::ProcessValidatedPacket() {
   if (self_ip_changed_ || self_port_changed_) {
     SendConnectionCloseWithDetails(QUIC_ERROR_MIGRATING_ADDRESS,
                                    "Self address migration is not supported.");
     return false;
   }
 
-  // TODO(fayang): Use peer_address_changed_ instead of peer_ip_changed_ and
-  // peer_port_changed_ once FLAGS_quic_allow_ip_migration is deprecated.
   if (peer_ip_changed_ || peer_port_changed_) {
     IPEndPoint old_peer_address = peer_address_;
     peer_address_ = IPEndPoint(
         peer_ip_changed_ ? migrating_peer_ip_ : peer_address_.address(),
         peer_port_changed_ ? migrating_peer_port_ : peer_address_.port());
 
     DVLOG(1) << ENDPOINT << "Peer's ip:port changed from "
              << old_peer_address.ToString() << " to "
              << peer_address_.ToString() << ", migrating connection.";
 
@@ skipping 926 matching lines @@
       packet_number_of_last_sent_packet_ + packets_between_mtu_probes_ + 1;
   ++mtu_probe_count_;
 
   DVLOG(2) << "Sending a path MTU discovery packet #" << mtu_probe_count_;
   SendMtuDiscoveryPacket(mtu_discovery_target_);
 
   DCHECK(!mtu_discovery_alarm_->IsSet());
 }
 
 }  // namespace net