Fix bug in QUIC SCUP message generation in which the client nonce was used in place of the CHLO has…

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 a8e7e857782f33c07dc4d7405de9eb6a430820ef..d4881fc441178e9bb586663ff21ae3a289bc2864 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -126,3 +126,7 @@ bool FLAGS_quic_loss_recovery_use_largest_acked = true;
 // Only set one alarm for sending at once, either the send alarm or
 // retransmission alarm.
 bool FLAGS_quic_only_one_sending_alarm = true;
+
+// If true, the hash of the CHLO message will be used in the proof generated for
+// an SCUP message.
+bool FLAGS_quic_use_hash_in_scup = true;