Revert of QUIC - enable "delay_tcp_race" parameter by default. This feature showed

net/http/http_network_session.cc

Index: net/http/http_network_session.cc
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index 64c78d49a4c15ad2ec76d6873f5046bb1713a16a..7bf2cdb579a06a4e6686a4ffdaa051f38e3ca4fc 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -115,6 +115,7 @@
       quic_max_number_of_lossy_connections(0),
       quic_packet_loss_threshold(1.0f),
       quic_socket_receive_buffer_size(kQuicSocketReceiveBufferSize),
+      quic_delay_tcp_race(false),
       quic_max_server_configs_stored_in_properties(0u),
       quic_clock(NULL),
       quic_random(NULL),
@@ -180,6 +181,7 @@
           params.quic_threshold_public_resets_post_handshake,
           params.quic_threshold_timeouts_streams_open,
           params.quic_socket_receive_buffer_size,
+          params.quic_delay_tcp_race,
           params.quic_max_server_configs_stored_in_properties,
           params.quic_close_sessions_on_ip_change,
           params.disable_quic_on_timeout_with_open_streams,
@@ -334,7 +336,7 @@
   dict->SetInteger("max_number_of_lossy_connections",
                    params_.quic_max_number_of_lossy_connections);
   dict->SetDouble("packet_loss_threshold", params_.quic_packet_loss_threshold);
-  dict->SetBoolean("delay_tcp_race", true);
+  dict->SetBoolean("delay_tcp_race", params_.quic_delay_tcp_race);
   dict->SetInteger("max_server_configs_stored_in_properties",
                    params_.quic_max_server_configs_stored_in_properties);
   dict->SetInteger("idle_connection_timeout_seconds",