Fix net_export.h includes.

net/quic/core/congestion_control/loss_detection_interface.h

 // Copyright 2014 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.
 //
 // The pure virtual class for send side loss detection algorithm.
 
 #ifndef NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
 #define NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_
 
+#include "net/base/net_export.h"
 #include "net/quic/core/congestion_control/send_algorithm_interface.h"
 #include "net/quic/core/quic_protocol.h"
 #include "net/quic/core/quic_time.h"
 
 namespace net {
 
 class QuicUnackedPacketMap;
 class RttStats;
 
 class NET_EXPORT_PRIVATE LossDetectionInterface {
@@ skipping 19 matching lines @@
   virtual void SpuriousRetransmitDetected(
       const QuicUnackedPacketMap& unacked_packets,
       QuicTime time,
       const RttStats& rtt_stats,
       QuicPacketNumber spurious_retransmission) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CONGESTION_CONTROL_LOSS_DETECTION_INTERFACE_H_