Fix net_export.h includes.

net/quic/chromium/bidirectional_stream_quic_impl.h

 // Copyright 2016 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_BIDIRECTIONAL_STREAM_QUIC_IMPL_H_
 #define NET_QUIC_BIDIRECTIONAL_STREAM_QUIC_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/load_timing_info.h"
+#include "net/base/net_export.h"
 #include "net/http/bidirectional_stream_impl.h"
 #include "net/quic/chromium/quic_chromium_client_session.h"
 #include "net/quic/chromium/quic_chromium_client_stream.h"
 #include "net/spdy/spdy_header_block.h"
 
 namespace base {
 class Timer;
 }  // namespace base
 
 namespace net {
@@ skipping 106 matching lines @@
   bool waiting_for_confirmation_;
 
   base::WeakPtrFactory<BidirectionalStreamQuicImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BidirectionalStreamQuicImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_BIDIRECTIONAL_STREAM_QUIC_IMPL_H_