Increases inflight limit for QUIC BBR if the ack rate in the past half-rtt was lower than half the…

net/quic/core/congestion_control/tcp_cubic_sender_base.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/core/congestion_control/tcp_cubic_sender_base.h"
 
 #include <algorithm>
 
 #include "net/quic/core/congestion_control/prr_sender.h"
 #include "net/quic/core/congestion_control/rtt_stats.h"
@@ skipping 170 matching lines @@
     prr_.OnPacketSent(bytes);
   }
   DCHECK_LT(largest_sent_packet_number_, packet_number);
   largest_sent_packet_number_ = packet_number;
   hybrid_slow_start_.OnPacketSent(packet_number);
   return true;
 }
 
 QuicTime::Delta TcpCubicSenderBase::TimeUntilSend(
     QuicTime /* now */,
-    QuicByteCount bytes_in_flight) const {
+    QuicByteCount bytes_in_flight) {
   if (!no_prr_ && InRecovery()) {
     // PRR is used when in recovery.
     return prr_.TimeUntilSend(GetCongestionWindow(), bytes_in_flight,
                               GetSlowStartThreshold());
   }
   if (GetCongestionWindow() > bytes_in_flight) {
     return QuicTime::Delta::Zero();
   }
   if (min4_mode_ && bytes_in_flight < 4 * kDefaultTCPMSS) {
     return QuicTime::Delta::Zero();
@@ skipping 71 matching lines @@
   last_cutback_exited_slowstart_ = false;
 }
 
 std::string TcpCubicSenderBase::GetDebugState() const {
   return "";
 }
 
 void TcpCubicSenderBase::OnApplicationLimited(QuicByteCount bytes_in_flight) {}
 
 }  // namespace net