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

net/quic/test_tools/quic_connection_peer.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_TEST_TOOLS_QUIC_CONNECTION_PEER_H_
 #define NET_QUIC_TEST_TOOLS_QUIC_CONNECTION_PEER_H_
 
 #include "base/macros.h"
 #include "net/quic/core/quic_connection.h"
 #include "net/quic/core/quic_connection_stats.h"
@@ skipping 48 matching lines @@
                              Perspective perspective);
 
   static void SetSelfAddress(QuicConnection* connection,
                              const QuicSocketAddress& self_address);
 
   static void SetPeerAddress(QuicConnection* connection,
                              const QuicSocketAddress& peer_address);
 
   static bool IsSilentCloseEnabled(QuicConnection* connection);
 
-  static bool IsMultipathEnabled(QuicConnection* connection);
-
   static void SwapCrypters(QuicConnection* connection, QuicFramer* framer);
 
   static void SetCurrentPacket(QuicConnection* connection,
                                QuicStringPiece current_packet);
 
   static QuicConnectionHelperInterface* GetHelper(QuicConnection* connection);
 
   static QuicAlarmFactory* GetAlarmFactory(QuicConnection* connection);
 
   static QuicFramer* GetFramer(QuicConnection* connection);
@@ skipping 39 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicConnectionPeer);
 };
 
 }  // namespace test
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_CONNECTION_PEER_H_