Fix net_export.h includes.

net/url_request/url_request_test_job.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_URL_REQUEST_URL_REQUEST_TEST_JOB_H_
 #define NET_URL_REQUEST_URL_REQUEST_TEST_JOB_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "net/base/load_timing_info.h"
+#include "net/base/net_export.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job.h"
 #include "net/url_request/url_request_job_factory.h"
 
 namespace net {
 
 // This job type is designed to help with simple unit tests. To use, you
 // probably want to inherit from it to set up the state you want. Then install
 // it as the protocol handler for the "test" scheme.
 //
@@ skipping 150 matching lines @@
 
   // Original size in bytes of the response headers before decoding.
   int response_headers_length_;
 
   base::WeakPtrFactory<URLRequestTestJob> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_TEST_JOB_H_