Limit QUIC's send algorithm max CWND by the peer's receive buffer and

net/quic/congestion_control/send_algorithm_interface.h

 // Copyright (c) 2012 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 congestion control algorithm.
 
 #ifndef NET_QUIC_CONGESTION_CONTROL_SEND_ALGORITHM_INTERFACE_H_
 #define NET_QUIC_CONGESTION_CONTROL_SEND_ALGORITHM_INTERFACE_H_
 
 #include <algorithm>
@@ skipping 29 matching lines @@
   virtual ~SendAlgorithmInterface() {}
 
   virtual void SetFromConfig(const QuicConfig& config,
                              Perspective perspective,
                              bool using_pacing) = 0;
 
   // Sets the number of connections to emulate when doing congestion control,
   // particularly for congestion avoidance.  Can be set any time.
   virtual void SetNumEmulatedConnections(int num_connections) = 0;
 
+  // Sets the maximum congestion window in bytes.
+  virtual void SetMaxCongestionWindow(QuicByteCount max_congestion_window) = 0;
+
   // Indicates an update to the congestion state, caused either by an incoming
   // ack or loss event timeout.  |rtt_updated| indicates whether a new
   // latest_rtt sample has been taken, |byte_in_flight| the bytes in flight
   // prior to the congestion event.  |acked_packets| and |lost_packets| are
   // any packets considered acked or lost as a result of the congestion event.
   virtual void OnCongestionEvent(bool rtt_updated,
                                  QuicByteCount bytes_in_flight,
                                  const CongestionVector& acked_packets,
                                  const CongestionVector& lost_packets) = 0;
 
@@ skipping 55 matching lines @@
 
   // Called by the Session when we get a bandwidth estimate from the client.
   // Returns true if initial connection state is changed as a result.
   virtual bool ResumeConnectionState(
       const CachedNetworkParameters& cached_network_params) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CONGESTION_CONTROL_SEND_ALGORITHM_INTERFACE_H_