Fix net_export.h includes.

net/quic/core/quic_frame_list.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_FRAME_LIST_H_
 #define NET_QUIC_QUIC_FRAME_LIST_H_
 
 #include <stddef.h>
 #include <list>
 #include <string>
 
 #include "base/strings/string_piece.h"
+#include "net/base/net_export.h"
 #include "net/quic/core/quic_protocol.h"
 #include "net/quic/core/quic_stream_sequencer_buffer_interface.h"
 
 namespace net {
 
 namespace test {
 class QuicStreamSequencerPeer;
 }
 
 class NET_EXPORT_PRIVATE QuicFrameList
@@ skipping 49 matching lines @@
 
   // Number of bytes in buffer.
   size_t num_bytes_buffered_ = 0;
 
   QuicStreamOffset total_bytes_read_ = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_FRAME_LIST_H_