Fix net_export.h includes.

net/quic/core/quic_stream_sequencer_buffer_interface.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_QUIC_QUIC_STREAM_SEQUENCER_BUFFER_INTERFACE_H_
 #define NET_QUIC_QUIC_STREAM_SEQUENCER_BUFFER_INTERFACE_H_
 
 #include <stddef.h>
 
+#include "net/base/net_export.h"
 #include "net/quic/core/quic_protocol.h"
 
 namespace net {
 
 // The QuicStreamSequencer uses an implementation of this interface to store
 // received data.
 class NET_EXPORT_PRIVATE QuicStreamSequencerBufferInterface {
  public:
   virtual ~QuicStreamSequencerBufferInterface() {}
 
@@ skipping 47 matching lines @@
   // Count how many bytes have been consumed (read out of buffer).
   virtual QuicStreamOffset BytesConsumed() const = 0;
 
   // Count how many bytes are in buffer at this moment.
   virtual size_t BytesBuffered() const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_STREAM_SEQUENCER_BUFFER_INTERFACE_H_