Add QUIC_VERSION_15 to add a revived_packets set to replace the

net/quic/quic_packet_creator.cc

Index: net/quic/quic_packet_creator.cc
diff --git a/net/quic/quic_packet_creator.cc b/net/quic/quic_packet_creator.cc
index 9164fd815221dc4c7d9241859d10b26eda8f15b5..b39965029134ee14cf06f586c55a8a8bc675c91b 100644
--- a/net/quic/quic_packet_creator.cc
+++ b/net/quic/quic_packet_creator.cc
@@ -89,7 +89,9 @@ bool QuicPacketCreator::ShouldSendFec(bool force_close) const {
 }
 
 void QuicPacketCreator::MaybeStartFEC() {
-  if (options_.max_packets_per_fec_group > 0 && fec_group_.get() == NULL) {
+  // Don't send FEC until QUIC_VERSION_15.
+  if (framer_->version() > QUIC_VERSION_14 &&
+      options_.max_packets_per_fec_group > 0 && fec_group_.get() == NULL) {
     DCHECK(queued_frames_.empty());
     // Set the fec group number to the sequence number of the next packet.
     fec_group_number_ = sequence_number() + 1;