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

components/cronet/android/test/javatests/src/org/chromium/net/QuicTest.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.net;
 
 import android.test.suitebuilder.annotation.LargeTest;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.Log;
@@ skipping 25 matching lines @@
 
         mBuilder = new CronetEngine.Builder(getContext());
         mBuilder.enableQUIC(true);
         mBuilder.addQuicHint(QuicTestServer.getServerHost(), QuicTestServer.getServerPort(),
                 QuicTestServer.getServerPort());
 
         JSONObject quicParams = new JSONObject()
                                         .put("connection_options", "PACE,IW10,FOO,DEADBEEF")
                                         .put("host_whitelist", "test.example.com")
                                         .put("max_server_configs_stored_in_properties", 2)
+                                        .put("delay_tcp_race", true)
                                         .put("max_number_of_lossy_connections", 10)
                                         .put("packet_loss_threshold", 0.5)
                                         .put("idle_connection_timeout_seconds", 300)
                                         .put("close_sessions_on_ip_change", false)
                                         .put("migrate_sessions_on_network_change", true)
                                         .put("migrate_sessions_early", true);
         JSONObject experimentalOptions = new JSONObject().put("QUIC", quicParams);
         mBuilder.setExperimentalOptions(experimentalOptions.toString());
 
         mBuilder.setMockCertVerifierForTesting(QuicTestServer.createMockCertVerifier());
@@ skipping 107 matching lines @@
     private boolean fileContainsString(String filename, String content) throws IOException {
         File file =
                 new File(CronetTestFramework.getTestStorage(getContext()) + "/prefs/" + filename);
         FileInputStream fileInputStream = new FileInputStream(file);
         byte[] data = new byte[(int) file.length()];
         fileInputStream.read(data);
         fileInputStream.close();
         return new String(data, "UTF-8").contains(content);
     }
 }