When talking >=QUIC_VERSION_22, regularly send updated bandwidth

net/quic/quic_sent_packet_manager.h

 // Copyright 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_QUIC_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <deque>
 #include <list>
 #include <map>
 #include <queue>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/linked_hash_map.h"
 #include "net/quic/congestion_control/loss_detection_interface.h"
 #include "net/quic/congestion_control/rtt_stats.h"
 #include "net/quic/congestion_control/send_algorithm_interface.h"
 #include "net/quic/quic_ack_notifier_manager.h"
 #include "net/quic/quic_protocol.h"
+#include "net/quic/quic_sustained_bandwidth_recorder.h"
 #include "net/quic/quic_unacked_packet_map.h"
 
 namespace net {
 
 namespace test {
 class QuicConnectionPeer;
 class QuicSentPacketManagerPeer;
 }  // namespace test
 
 class QuicClock;
@@ skipping 156 matching lines @@
   // Returns the current delay for the retransmission timer, which may send
   // either a tail loss probe or do a full RTO.  Returns QuicTime::Zero() if
   // there are no retransmittable packets.
   const QuicTime GetRetransmissionTime() const;
 
   const RttStats* GetRttStats() const;
 
   // Returns the estimated bandwidth calculated by the congestion algorithm.
   QuicBandwidth BandwidthEstimate() const;
 
-  // Returns true if the current bandwidth estimate is reliable.
+  // Returns true if the current instantaneous bandwidth estimate is reliable.
   bool HasReliableBandwidthEstimate() const;
 
+  const QuicSustainedBandwidthRecorder& SustainedBandwidthRecorder() const;
+
   // Returns the size of the current congestion window in bytes.  Note, this is
   // not the *available* window.  Some send algorithms may not use a congestion
   // window and will return 0.
   QuicByteCount GetCongestionWindow() const;
 
   // Returns the size of the slow start congestion window in bytes,
   // aka ssthresh.  Some send algorithms do not define a slow start
   // threshold and will return 0.
   QuicByteCount GetSlowStartThreshold() const;
 
@@ skipping 157 matching lines @@
   // Sets of packets acked and lost as a result of the last congestion event.
   SendAlgorithmInterface::CongestionMap packets_acked_;
   SendAlgorithmInterface::CongestionMap packets_lost_;
 
   // Set to true after the crypto handshake has successfully completed. After
   // this is true we no longer use HANDSHAKE_MODE, and further frames sent on
   // the crypto stream (i.e. SCUP messages) are treated like normal
   // retransmittable frames.
   bool handshake_confirmed_;
 
+  // Records bandwidth from server to client in normal operation, over periods
+  // of time with no loss events.
+  QuicSustainedBandwidthRecorder sustained_bandwidth_recorder_;
+
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_