Add OnConnectionMigration method to QuicSentPacketManager. Add OnConnectionMigration interface to S…

net/quic/quic_sent_packet_manager.cc

Index: net/quic/quic_sent_packet_manager.cc
diff --git a/net/quic/quic_sent_packet_manager.cc b/net/quic/quic_sent_packet_manager.cc
index 586d27a17fa08b7f7ba6a8ee69e647b5a50bd4e5..20d357a04922ec53eb24ae4234f7a1cf69ccad8d 100644
--- a/net/quic/quic_sent_packet_manager.cc
+++ b/net/quic/quic_sent_packet_manager.cc
@@ -935,4 +935,19 @@ void QuicSentPacketManager::EnablePacing() {
                        kInitialUnpacedBurst));
 }
 
+void QuicSentPacketManager::OnConnectionMigration(PeerAddressChangeType type) {
+  if (type == UNKNOWN) {
+    return;
+  }
+
+  if (type == NAT_PORT_REBINDING || type == IPV4_SUBNET_REBINDING) {
+    // Rtt and cwnd do not need to be reset when the peer address change is
+    // considered to be caused by NATs.
+    return;
+  }
+
+  rtt_stats_.OnConnectionMigration();
+  send_algorithm_->OnConnectionMigration();
+}
+
 }  // namespace net