Simplify RTO interaction between the QUIC sent packet manager and the

net/quic/congestion_control/inter_arrival_sender.h

 // Copyright (c) 2013 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_CONGESTION_CONTROL_INTER_ARRIVAL_SENDER_H_
 #define NET_QUIC_CONGESTION_CONTROL_INTER_ARRIVAL_SENDER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
@@ skipping 31 matching lines @@
                              QuicByteCount acked_bytes,
                              QuicTime::Delta rtt) OVERRIDE;
   virtual void OnPacketLost(QuicPacketSequenceNumber sequence_number,
                             QuicTime ack_receive_time) OVERRIDE;
   virtual bool OnPacketSent(
       QuicTime sent_time,
       QuicPacketSequenceNumber sequence_number,
       QuicByteCount bytes,
       TransmissionType transmission_type,
       HasRetransmittableData has_retransmittable_data) OVERRIDE;
-  virtual void OnRetransmissionTimeout() OVERRIDE;
+  virtual void OnRetransmissionTimeout(bool packets_retransmitted) OVERRIDE;
   virtual void OnPacketAbandoned(QuicPacketSequenceNumber sequence_number,
                                  QuicByteCount abandoned_bytes) OVERRIDE;
   virtual QuicTime::Delta TimeUntilSend(
       QuicTime now,
       TransmissionType transmission_type,
       HasRetransmittableData has_retransmittable_data,
       IsHandshake handshake) OVERRIDE;
   virtual QuicBandwidth BandwidthEstimate() const OVERRIDE;
   virtual QuicTime::Delta SmoothedRtt() const OVERRIDE;
   virtual QuicTime::Delta RetransmissionDelay() const OVERRIDE;
@@ skipping 30 matching lines @@
   BandwidthUsage bandwidth_usage_state_;
   QuicTime back_down_time_;  // Time when we decided to back down.
   QuicBandwidth back_down_bandwidth_;  // Bandwidth before backing down.
   QuicTime::Delta back_down_congestion_delay_;  // Delay when backing down.
 
   DISALLOW_COPY_AND_ASSIGN(InterArrivalSender);
 };
 
 }  // namespace net
 #endif  // NET_QUIC_CONGESTION_CONTROL_INTER_ARRIVAL_SENDER_H_