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

net/quic/core/quic_flags_list.h

Index: net/quic/core/quic_flags_list.h
diff --git a/net/quic/core/quic_flags_list.h b/net/quic/core/quic_flags_list.h
index 663c5053c6c75a6cb09ebef4ca7cc8d64047fabd..3757a97d20eaeddf86074c4af849d0144c59ce80 100644
--- a/net/quic/core/quic_flags_list.h
+++ b/net/quic/core/quic_flags_list.h
@@ -208,3 +208,12 @@ QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_enable_random_padding, false)
 // Use conservation in PROBE_BW ouside of super-unity gain and immediately
 // preceeding cycle.
 QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_bbr_extra_conservation, false)
+
+// Increase BBR's inflight limit if recent ack rate is low.
+QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_bbr_slow_recent_delivery, false)
+
+// Congestion window gain for QUIC BBR during slow delivery.
+QUIC_FLAG(double, FLAGS_quic_bbr_slow_delivery_cwnd_gain, 4.0f );
+
+// Threshold multiplier below which delivery is considered slow.
+QUIC_FLAG(double, FLAGS_quic_bbr_slow_delivery_threshold_multiplier, 0.5f);