relnote: Deprecate FLAGS_quic_send_fec_packet_only_on_fec_alarm.

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 8a8fb870f85723fa3a2114ae89b51a1e7ad8b338..4f09086727aa543ce876ab959a84ed90b05d8c02 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -365,8 +365,7 @@ void QuicConnection::SetFromConfig(const QuicConfig& config) {
   }
   max_undecryptable_packets_ = config.max_undecryptable_packets();
 
-  if (FLAGS_quic_send_fec_packet_only_on_fec_alarm &&
-      config.HasClientSentConnectionOption(kFSPA, perspective_)) {
+  if (config.HasClientSentConnectionOption(kFSPA, perspective_)) {
     packet_generator_.set_fec_send_policy(FecSendPolicy::FEC_ALARM_TRIGGER);
   }