Update from https://crrev.com/307330

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 c9658c1a38e0b2e32a21576d62c566c1de6381c8..306ac2d2d84c45051a341ddd61c80fe0bf610484 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -32,10 +32,6 @@ bool FLAGS_enable_quic_fec = false;
 // When true, defaults to BBR congestion control instead of Cubic.
 bool FLAGS_quic_use_bbr_congestion_control = false;
 
-// If true, QUIC will be more resilliant to junk packets with valid connection
-// IDs.
-bool FLAGS_quic_drop_junk_packets = true;
-
 // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC
 // connection options.
 bool FLAGS_quic_allow_bbr = false;
@@ -61,3 +57,11 @@ bool FLAGS_quic_record_send_time_before_write = false;
 // If true, enables the QUIC bandwidth resumption experiment (triggered by
 // Chrome/Finch).
 bool FLAGS_quic_enable_bandwidth_resumption_experiment = true;
+
+// If true, QUIC congestion control will be paced.  If false, pacing may be
+// controlled by QUIC connection options in the config or by enabling BBR
+// congestion control.
+bool FLAGS_quic_enable_pacing = false;
+
+// If true, the silent close option will be honored.
+bool FLAGS_quic_allow_silent_close = true;