Remove TCP and BBR's max congestion window. No practical change,

net/quic/quic_connection.cc

 // 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.
 
 #include "net/quic/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 43 matching lines @@
 // This will likely have to be tuned.
 const QuicPacketSequenceNumber kMaxPacketGap = 5000;
 
 // Limit the number of FEC groups to two.  If we get enough out of order packets
 // that this becomes limiting, we can revisit.
 const size_t kMaxFecGroups = 2;
 
 // Maximum number of acks received before sending an ack in response.
 const QuicPacketCount kMaxPacketsReceivedBeforeAckSend = 20;
 
-// Maximum number of tracked packets.
-const QuicPacketCount kMaxTrackedPackets = 5 * kMaxTcpCongestionWindow;
-
 bool Near(QuicPacketSequenceNumber a, QuicPacketSequenceNumber b) {
   QuicPacketSequenceNumber delta = (a > b) ? a - b : b - a;
   return delta <= kMaxPacketGap;
 }
 
 // An alarm that is scheduled to send an ack if a timeout occurs.
 class AckAlarm : public QuicAlarm::Delegate {
  public:
   explicit AckAlarm(QuicConnection* connection)
       : connection_(connection) {
@@ skipping 2005 matching lines @@
   }
   for (const QuicFrame& frame : retransmittable_frames->frames()) {
     if (frame.type == CONNECTION_CLOSE_FRAME) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace net