Enable AltSvc pooling by default.

ios/chrome/browser/ios_chrome_io_thread.mm

 // 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.
 
 #include "ios/chrome/browser/ios_chrome_io_thread.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 734 matching lines @@
   ConfigureQuicGlobals(group, params, globals_);
 }
 
 void IOSChromeIOThread::ConfigureQuicGlobals(
     base::StringPiece quic_trial_group,
     const VariationParameters& quic_trial_params,
     IOSChromeIOThread::Globals* globals) {
   bool enable_quic = ShouldEnableQuic(quic_trial_group);
   globals->enable_quic.set(enable_quic);
 
-  if (ShouldQuicEnableAlternativeServicesForDifferentHost(quic_trial_params)) {
-    globals->enable_alternative_service_with_different_host.set(true);
-    globals->parse_alternative_services.set(true);
-  } else {
-    globals->enable_alternative_service_with_different_host.set(false);
-  }
+  globals->enable_alternative_service_with_different_host.set(
+      ShouldQuicEnableAlternativeServicesForDifferentHost(quic_trial_params));
 
   if (enable_quic) {
     globals->quic_always_require_handshake_confirmation.set(
         ShouldQuicAlwaysRequireHandshakeConfirmation(quic_trial_params));
     globals->quic_disable_connection_pooling.set(
         ShouldQuicDisableConnectionPooling(quic_trial_params));
     int receive_buffer_size = GetQuicSocketReceiveBufferSize(quic_trial_params);
     if (receive_buffer_size != 0) {
       globals->quic_socket_receive_buffer_size.set(receive_buffer_size);
     }
@@ skipping 109 matching lines @@
 }
 
 bool IOSChromeIOThread::ShouldQuicPreferAes(
     const VariationParameters& quic_trial_params) {
   return base::LowerCaseEqualsASCII(
       GetVariationParam(quic_trial_params, "prefer_aes"), "true");
 }
 
 bool IOSChromeIOThread::ShouldQuicEnableAlternativeServicesForDifferentHost(
     const VariationParameters& quic_trial_params) {
-  // TODO(bnc): Remove inaccurately named "use_alternative_services" parameter.
-  return base::LowerCaseEqualsASCII(
-             GetVariationParam(quic_trial_params, "use_alternative_services"),
-             "true") ||
-         base::LowerCaseEqualsASCII(
-             GetVariationParam(
-                 quic_trial_params,
-                 "enable_alternative_service_with_different_host"),
-             "true");
+  return !base::LowerCaseEqualsASCII(
+      GetVariationParam(quic_trial_params,
+                        "enable_alternative_service_with_different_host"),
+      "false");
 }
 
 int IOSChromeIOThread::GetQuicMaxNumberOfLossyConnections(
     const VariationParameters& quic_trial_params) {
   int value;
   if (base::StringToInt(GetVariationParam(quic_trial_params,
                                           "max_number_of_lossy_connections"),
                         &value)) {
     return value;
   }
@@ skipping 108 matching lines @@
 
   globals->system_http_network_session.reset(
       new net::HttpNetworkSession(system_params));
   globals->system_http_transaction_factory.reset(
       new net::HttpNetworkLayer(globals->system_http_network_session.get()));
   context->set_http_transaction_factory(
       globals->system_http_transaction_factory.get());
 
   return context;
 }