Fix net_export.h includes.

net/quic/core/quic_config.h

 // Copyright (c) 2013 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_QUIC_CONFIG_H_
 #define NET_QUIC_QUIC_CONFIG_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <string>
 
+#include "net/base/net_export.h"
 #include "net/quic/core/quic_protocol.h"
 #include "net/quic/core/quic_time.h"
 
 namespace net {
 
 namespace test {
 class QuicConfigPeer;
 }  // namespace test
 
 class CryptoHandshakeMessage;
@@ skipping 427 matching lines @@
   // An alternate server address the client could connect to.
   QuicFixedIPEndPoint alternate_server_address_;
 
   // Force HOL blocking for measurement purposes.
   QuicFixedUint32 force_hol_blocking_;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONFIG_H_