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

net/quic/quic_stream_factory_test.cc

Index: net/quic/quic_stream_factory_test.cc
diff --git a/net/quic/quic_stream_factory_test.cc b/net/quic/quic_stream_factory_test.cc
index a3e647343aac83ca2c26b7eec5a7208fa35c3569..653e9eb6e755af7eee87e1f5945dcf20174d5e14 100644
--- a/net/quic/quic_stream_factory_test.cc
+++ b/net/quic/quic_stream_factory_test.cc
@@ -294,6 +294,7 @@ class QuicStreamFactoryTestBase {
         threshold_timeouts_with_open_streams_(2),
         threshold_public_resets_post_handshake_(2),
         receive_buffer_size_(0),
+        delay_tcp_race_(true),
         close_sessions_on_ip_change_(false),
         disable_quic_on_timeout_with_open_streams_(false),
         idle_connection_timeout_seconds_(kIdleConnectionTimeoutSeconds),
@@ -325,7 +326,7 @@ class QuicStreamFactoryTestBase {
         prefer_aes_, max_number_of_lossy_connections_, packet_loss_threshold_,
         max_disabled_reasons_, threshold_timeouts_with_open_streams_,
         threshold_public_resets_post_handshake_, receive_buffer_size_,
-        /*max_server_configs_stored_in_properties*/ 0,
+        delay_tcp_race_, /*max_server_configs_stored_in_properties*/ 0,
         close_sessions_on_ip_change_,
         disable_quic_on_timeout_with_open_streams_,
         idle_connection_timeout_seconds_, migrate_sessions_on_network_change_,
@@ -514,6 +515,7 @@ class QuicStreamFactoryTestBase {
   int threshold_timeouts_with_open_streams_;
   int threshold_public_resets_post_handshake_;
   int receive_buffer_size_;
+  bool delay_tcp_race_;
   bool close_sessions_on_ip_change_;
   bool disable_quic_on_timeout_with_open_streams_;
   int idle_connection_timeout_seconds_;
@@ -3650,6 +3652,8 @@ TEST_P(QuicStreamFactoryTest, EnableDelayTcpRace) {
   Initialize();
   ProofVerifyDetailsChromium verify_details = DefaultProofVerifyDetails();
   crypto_client_stream_factory_.AddProofVerifyDetails(&verify_details);
+  bool delay_tcp_race = QuicStreamFactoryPeer::GetDelayTcpRace(factory_.get());
+  QuicStreamFactoryPeer::SetDelayTcpRace(factory_.get(), false);
   MockRead reads[] = {MockRead(SYNCHRONOUS, ERR_IO_PENDING, 0)};
   SequencedSocketData socket_data(reads, arraysize(reads), nullptr, 0);
   socket_factory_.AddSocketDataProvider(&socket_data);
@@ -3672,6 +3676,15 @@ TEST_P(QuicStreamFactoryTest, EnableDelayTcpRace) {
                             /*cert_verify_flags=*/0, url_, "POST", net_log_,
                             callback_.callback()));
 
+  // If we don't delay TCP connection, then time delay should be 0.
+  QuicStreamFactoryPeer::SetDelayTcpRace(factory_.get(), false);
+  EXPECT_FALSE(factory_->delay_tcp_race());
+  EXPECT_EQ(base::TimeDelta(), request.GetTimeDelayForWaitingJob());
+
+  // Enable |delay_tcp_race_| param and verify delay is one RTT and that
+  // server supports QUIC.
+  QuicStreamFactoryPeer::SetDelayTcpRace(factory_.get(), true);
+  EXPECT_TRUE(factory_->delay_tcp_race());
   EXPECT_EQ(base::TimeDelta::FromMicroseconds(15),
             request.GetTimeDelayForWaitingJob());
 
@@ -3685,6 +3698,7 @@ TEST_P(QuicStreamFactoryTest, EnableDelayTcpRace) {
   EXPECT_TRUE(stream.get());
   EXPECT_TRUE(socket_data.AllReadDataConsumed());
   EXPECT_TRUE(socket_data.AllWriteDataConsumed());
+  QuicStreamFactoryPeer::SetDelayTcpRace(factory_.get(), delay_tcp_race);
 }
 
 TEST_P(QuicStreamFactoryTest, MaybeInitialize) {