Fix net_export.h includes.

net/quic/core/quic_sent_packet_manager_interface.h

 // Copyright 2016 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_SENT_PACKET_MANAGER_INTERFACE_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_
 
 #include "base/macros.h"
+#include "net/base/net_export.h"
 #include "net/quic/core/quic_protocol.h"
 #include "net/quic/core/quic_sustained_bandwidth_recorder.h"
 
 namespace net {
 
 class QuicConfig;
 class RttStats;
 
 class NET_EXPORT_PRIVATE QuicSentPacketManagerInterface {
  public:
@@ skipping 166 matching lines @@
   virtual size_t GetConsecutiveTlpCount() const = 0;
 
   // Signals to the congestion controller that the connection has no outstanding
   // data to send.
   virtual void OnApplicationLimited() = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_INTERFACE_H_