Fix net_export.h includes.

net/quic/core/quic_stream_sequencer_buffer.h

 // Copyright (c) 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_QUIC_QUIC_STREAM_SEQUENCER_BUFFER_H_
 #define NET_QUIC_QUIC_STREAM_SEQUENCER_BUFFER_H_
 
 // QuicStreamSequencerBuffer implements QuicStreamSequencerBufferInterface.
 // It is a circular stream buffer with random write and
 // in-sequence read. It consists of a vector of pointers pointing
@@ skipping 49 matching lines @@
 //  size_t consumed = consume_iovs(iovs, iov_count);
 //  buffer.MarkConsumed(consumed);
 
 #include <stddef.h>
 
 #include <functional>
 #include <list>
 #include <memory>
 
 #include "base/macros.h"
+#include "net/base/net_export.h"
 #include "net/quic/core/quic_protocol.h"
 
 namespace net {
 
 namespace test {
 class QuicStreamSequencerBufferPeer;
 }  // namespace test
 
 class NET_EXPORT_PRIVATE QuicStreamSequencerBuffer {
  public:
@@ skipping 173 matching lines @@
   size_t num_bytes_buffered_;
 
   // Stores all the buffered frames' start offset, length and arrival time.
   std::map<QuicStreamOffset, FrameInfo> frame_arrival_time_map_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicStreamSequencerBuffer);
 };
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_STREAM_SEQUENCER_BUFFER_H_