Fix net_export.h includes.

net/spdy/bidirectional_stream_spdy_impl.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_SPDY_BIDIRECTIONAL_STREAM_SPDY_IMPL_H_
 #define NET_SPDY_BIDIRECTIONAL_STREAM_SPDY_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.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/http/bidirectional_stream_request_info.h"
 #include "net/http/http_request_info.h"
 #include "net/spdy/spdy_read_queue.h"
 #include "net/spdy/spdy_session.h"
 #include "net/spdy/spdy_stream.h"
 
 namespace base {
 class Timer;
 }  // namespace base
@@ skipping 88 matching lines @@
   scoped_refptr<IOBuffer> pending_combined_buffer_;
 
   base::WeakPtrFactory<BidirectionalStreamSpdyImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BidirectionalStreamSpdyImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_BIDIRECTIONAL_STREAM_SPDY_IMPL_H_