Remove multipath_enabled from quic_config and quic_connection. No functional change expected.

net/quic/test_tools/quic_connection_peer.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/test_tools/quic_connection_peer.h"
 
 #include "net/quic/core/congestion_control/send_algorithm_interface.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_packet_writer.h"
 #include "net/quic/core/quic_received_packet_manager.h"
@@ skipping 86 matching lines @@
   connection->peer_address_ = peer_address;
 }
 
 // static
 bool QuicConnectionPeer::IsSilentCloseEnabled(QuicConnection* connection) {
   return connection->idle_timeout_connection_close_behavior_ ==
          ConnectionCloseBehavior::SILENT_CLOSE;
 }
 
 // static
-bool QuicConnectionPeer::IsMultipathEnabled(QuicConnection* connection) {
-  return connection->multipath_enabled_;
-}
-
-// static
 void QuicConnectionPeer::SwapCrypters(QuicConnection* connection,
                                       QuicFramer* framer) {
   QuicFramerPeer::SwapCrypters(framer, &connection->framer_);
 }
 
 // static
 void QuicConnectionPeer::SetCurrentPacket(QuicConnection* connection,
                                           QuicStringPiece current_packet) {
   connection->current_packet_data_ = current_packet.data();
   connection->last_size_ = current_packet.size();
@@ skipping 136 matching lines @@
 }
 
 // static
 void QuicConnectionPeer::SetNoStopWaitingFrames(QuicConnection* connection,
                                                 bool no_stop_waiting_frames) {
   connection->no_stop_waiting_frames_ = no_stop_waiting_frames;
 }
 
 }  // namespace test
 }  // namespace net