Deprecate FLAGS_use_stream_frame_freelist.

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 5818a624221a61a6fc824280bae26ea2c3f76fff..8c97b926aa02e804913a974147a582c5e030199f 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -131,10 +131,6 @@ bool FLAGS_require_strike_register_or_server_nonce = true;
 // When turn on, log packet loss into transport connection stats LossEvent.
 bool FLAGS_quic_log_loss_event = true;
 
-// If true, use a free list for the stream frame buffer allocations in
-// QuicPacketCreator.
-bool FLAGS_use_stream_frame_freelist = true;
-
 // If true, for QUIC authenticated encryption algorithms, last 8 bytes
 // of IV comprise packet path id and lower 7 bytes of packet number.
 bool FLAGS_quic_include_path_id_in_iv = true;