Fix net_export.h includes.

net/base/net_error_details.h

 // Copyright 2015 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_BASE_NET_ERROR_DETAILS_H_
 #define NET_BASE_NET_ERROR_DETAILS_H_
 
+#include "net/base/net_export.h"
 #include "net/http/http_response_info.h"
 #include "net/quic/core/quic_protocol.h"
 
 namespace net {
 
 // A record of net errors with granular error specification generated by
 // net stack.
 struct NET_EXPORT NetErrorDetails {
   NetErrorDetails()
       : quic_broken(false),
@@ skipping 16 matching lines @@
   // from response header from the server.
   HttpResponseInfo::ConnectionInfo connection_info;
   // True if receives a GoAway frame from the server due to connection
   // migration with port change.
   bool quic_port_migration_detected;
 };
 
 }  // namespace net
 
 #endif