QUIC - Add back to code to experiment with delay_tcp_race. By default,

net/quic/test_tools/quic_stream_factory_peer.cc

Index: net/quic/test_tools/quic_stream_factory_peer.cc
diff --git a/net/quic/test_tools/quic_stream_factory_peer.cc b/net/quic/test_tools/quic_stream_factory_peer.cc
index 63ec75daa1b2e3d59af3a466629c433f9681735c..0d58f20a63b21a95e032c3a796dc1f7ec571fbf2 100644
--- a/net/quic/test_tools/quic_stream_factory_peer.cc
+++ b/net/quic/test_tools/quic_stream_factory_peer.cc
@@ -73,6 +73,15 @@ bool QuicStreamFactoryPeer::IsQuicDisabled(QuicStreamFactory* factory,
   return factory->IsQuicDisabled(port);
 }
 
+bool QuicStreamFactoryPeer::GetDelayTcpRace(QuicStreamFactory* factory) {
+  return factory->delay_tcp_race_;
+}
+
+void QuicStreamFactoryPeer::SetDelayTcpRace(QuicStreamFactory* factory,
+                                            bool delay_tcp_race) {
+  factory->delay_tcp_race_ = delay_tcp_race;
+}
+
 void QuicStreamFactoryPeer::SetYieldAfterPackets(QuicStreamFactory* factory,
                                                  int yield_after_packets) {
   factory->yield_after_packets_ = yield_after_packets;