QUIC - added disable_delay_tcp_race field trial param to disable delaying of racing TCP connection

components/network_session_configurator/network_session_configurator_unittest.cc

Index: components/network_session_configurator/network_session_configurator_unittest.cc
diff --git a/components/network_session_configurator/network_session_configurator_unittest.cc b/components/network_session_configurator/network_session_configurator_unittest.cc
index a2dc72fa9129ba07bcd11041d34b29a8d6b7792b..bcc14ee319f99d81199f5b3d7da025fd0904ade4 100644
--- a/components/network_session_configurator/network_session_configurator_unittest.cc
+++ b/components/network_session_configurator/network_session_configurator_unittest.cc
@@ -218,6 +218,7 @@ TEST_F(NetworkSessionConfiguratorTest, EnableQuicFromFieldTrialGroup) {
   EXPECT_FALSE(params_.enable_alternative_service_with_different_host);
   EXPECT_EQ(0, params_.quic_max_number_of_lossy_connections);
   EXPECT_EQ(1.0f, params_.quic_packet_loss_threshold);
+  EXPECT_TRUE(params_.quic_delay_tcp_race);
   EXPECT_FALSE(params_.quic_close_sessions_on_ip_change);
   EXPECT_EQ(net::kIdleConnectionTimeoutSeconds,
             params_.quic_idle_connection_timeout_seconds);
@@ -562,6 +563,17 @@ TEST_F(NetworkSessionConfiguratorTest, QuicReceiveBufferSize) {
   EXPECT_EQ(2097152, params_.quic_socket_receive_buffer_size);
 }
 
+TEST_F(NetworkSessionConfiguratorTest, QuicDisableDelayTcpRace) {
+  std::map<std::string, std::string> field_trial_params;
+  field_trial_params["disable_delay_tcp_race"] = "true";
+  variations::AssociateVariationParams("QUIC", "Enabled", field_trial_params);
+  base::FieldTrialList::CreateFieldTrial("QUIC", "Enabled");
+
+  ParseFieldTrials();
+
+  EXPECT_FALSE(params_.quic_delay_tcp_race);
+}
+
 TEST_F(NetworkSessionConfiguratorTest, QuicOriginsToForceQuicOn) {
   base::CommandLine::ForCurrentProcess()->AppendSwitch("enable-quic");
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(