Roll Chrome into Mojo.

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 b395eacdc14ca2455f62e7669ca778e521ded375..3146a583bb4b8cbf872500fec02d939d52ac56e4 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -68,3 +68,11 @@ bool FLAGS_quic_disallow_multiple_pending_ack_frames = true;
 // If true, then the source address tokens generated for QUIC connects will
 // store multiple addresses.
 bool FLAGS_quic_use_multiple_address_in_source_tokens = false;
+
+// If true, an attempt to send an empty data string with no FIN will return
+// early, and not create a frame.
+bool FLAGS_quic_empty_data_no_fin_early_return = true;
+
+// If true, if min RTT and/or SRTT have not yet been set then initial RTT is
+// used to initialize them in a call to QuicConnection::GetStats.
+bool FLAGS_quic_use_initial_rtt_for_stats = true;