[m53 merge] Use LeastUnacked to calculate the packet number length instead of GetLeastPacketAwaited…

net/quic/quic_flags.cc

Index: net/quic/quic_flags.cc
diff --git a/net/quic/quic_flags.cc b/net/quic/quic_flags.cc
index 632e557e7dac7e818ec756fa6f5e1b809d8cd340..4f1f97c87542a4fda63b706d402893251bf1772c 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -138,6 +138,10 @@ bool FLAGS_quic_no_shlo_listener = true;
 // socket, are always sent once the socket gets unblocked
 bool FLAGS_quic_always_write_queued_retransmissions = true;
 
+// Use GetLeastUnacked when updating the packet number length, instead of
+// GetLeastPacketAwaitedByPeer.
+bool FLAGS_quic_least_unacked_packet_number_length = true;
+
 // Adds a RATE connection option to do rate based sending.
 bool FLAGS_quic_rate_based_sending = true;