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

net/quic/quic_stream_factory.cc

Index: net/quic/quic_stream_factory.cc
diff --git a/net/quic/quic_stream_factory.cc b/net/quic/quic_stream_factory.cc
index 1620ae2259f964fc378255912c0abe45db20eb17..1a31440464be54682cc8b85b94858f32033a6a15 100644
--- a/net/quic/quic_stream_factory.cc
+++ b/net/quic/quic_stream_factory.cc
@@ -587,6 +587,7 @@ QuicStreamFactory::QuicStreamFactory(
     int threshold_public_resets_post_handshake,
     int threshold_timeouts_with_open_streams,
     int socket_receive_buffer_size,
+    bool delay_tcp_race,
     int max_server_configs_stored_in_properties,
     bool close_sessions_on_ip_change,
     bool disable_quic_on_timeout_with_open_streams,
@@ -635,6 +636,7 @@ QuicStreamFactory::QuicStreamFactory(
       threshold_public_resets_post_handshake_(
           threshold_public_resets_post_handshake),
       socket_receive_buffer_size_(socket_receive_buffer_size),
+      delay_tcp_race_(delay_tcp_race),
       yield_after_packets_(kQuicYieldAfterPacketsRead),
       yield_after_duration_(QuicTime::Delta::FromMilliseconds(
           kQuicYieldAfterDurationMilliseconds)),
@@ -731,7 +733,7 @@ bool QuicStreamFactory::ZeroRTTEnabledFor(const QuicServerId& quic_server_id) {
 
 base::TimeDelta QuicStreamFactory::GetTimeDelayForWaitingJob(
     const QuicServerId& server_id) {
-  if (require_confirmation_)
+  if (!delay_tcp_race_ || require_confirmation_)
     return base::TimeDelta();
   int64_t srtt =
       1.5 * GetServerNetworkStatsSmoothedRttInMicroseconds(server_id);