QUIC - FieldTrial parameters not do PreConnect if QUIC can do 0RTT.

chrome/browser/io_thread.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/io_thread.h"
 
 #include <vector>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 1104 matching lines @@
       &params->enable_quic_port_selection);
   globals.quic_max_packet_length.CopyToIfSet(&params->quic_max_packet_length);
   globals.quic_user_agent_id.CopyToIfSet(&params->quic_user_agent_id);
   globals.quic_supported_versions.CopyToIfSet(
       &params->quic_supported_versions);
   params->quic_connection_options = globals.quic_connection_options;
   globals.quic_close_sessions_on_ip_change.CopyToIfSet(
       &params->quic_close_sessions_on_ip_change);
   globals.quic_idle_connection_timeout_seconds.CopyToIfSet(
       &params->quic_idle_connection_timeout_seconds);
+  globals.quic_disable_preconnect_if_0rtt.CopyToIfSet(
+      &params->quic_disable_preconnect_if_0rtt);
 
   globals.origin_to_force_quic_on.CopyToIfSet(
       &params->origin_to_force_quic_on);
   params->enable_user_alternate_protocol_ports =
       globals.enable_user_alternate_protocol_ports;
 }
 
 base::TimeTicks IOThread::creation_time() const {
   return creation_time_;
 }
@@ skipping 117 matching lines @@
     globals->quic_connection_options =
         GetQuicConnectionOptions(command_line, quic_trial_params);
     globals->quic_close_sessions_on_ip_change.set(
         ShouldQuicCloseSessionsOnIpChange(quic_trial_params));
     int idle_connection_timeout_seconds = GetQuicIdleConnectionTimeoutSeconds(
         quic_trial_params);
     if (idle_connection_timeout_seconds != 0) {
       globals->quic_idle_connection_timeout_seconds.set(
           idle_connection_timeout_seconds);
     }
+    globals->quic_disable_preconnect_if_0rtt.set(
+        ShouldQuicDisablePreConnectIfZeroRtt(quic_trial_params));
   }
 
   size_t max_packet_length = GetQuicMaxPacketLength(command_line,
                                                     quic_trial_params);
   if (max_packet_length != 0) {
     globals->quic_max_packet_length.set(max_packet_length);
   }
 
   std::string quic_user_agent_id = chrome::GetChannelString();
   if (!quic_user_agent_id.empty())
@@ skipping 232 matching lines @@
     const VariationParameters& quic_trial_params) {
   int value;
   if (base::StringToInt(GetVariationParam(quic_trial_params,
                                           "idle_connection_timeout_seconds"),
                         &value)) {
     return value;
   }
   return 0;
 }
 
+bool IOThread::ShouldQuicDisablePreConnectIfZeroRtt(
+    const VariationParameters& quic_trial_params) {
+  return base::LowerCaseEqualsASCII(
+      GetVariationParam(quic_trial_params, "disable_preconnect_if_0rtt"),
+      "true");
+}
+
 size_t IOThread::GetQuicMaxPacketLength(
     const base::CommandLine& command_line,
     const VariationParameters& quic_trial_params) {
   if (command_line.HasSwitch(switches::kQuicMaxPacketLength)) {
     unsigned value;
     if (!base::StringToUint(
             command_line.GetSwitchValueASCII(switches::kQuicMaxPacketLength),
             &value)) {
       return 0;
     }
@@ skipping 158 matching lines @@
   globals->proxy_script_fetcher_url_request_job_factory = job_factory.Pass();
 
   context->set_job_factory(
       globals->proxy_script_fetcher_url_request_job_factory.get());
 
   // TODO(rtenneti): We should probably use HttpServerPropertiesManager for the
   // system URLRequestContext too. There's no reason this should be tied to a
   // profile.
   return context;
 }