Enable AltSvc pooling by default.

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index 60883cd7a02074e2433b8df1345cfefa7b33a960..44a5755307f924783d743e69ad868cb07b805748 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -999,8 +999,7 @@ void IOThread::NetworkSessionConfigurator::ConfigureAltSvcParams(
     const base::CommandLine& command_line,
     base::StringPiece altsvc_trial_group,
     net::HttpNetworkSession::Params* params) {
-  if (command_line.HasSwitch(switches::kEnableAlternativeServices) ||
-      altsvc_trial_group.starts_with(kAltSvcFieldTrialEnabledPrefix)) {
+  if (altsvc_trial_group.starts_with(kAltSvcFieldTrialEnabledPrefix)) {
     params->parse_alternative_services = true;
     return;
   }
@@ -1182,13 +1181,9 @@ void IOThread::NetworkSessionConfigurator::ConfigureQuicParams(
   params->disable_quic_on_timeout_with_open_streams =
       ShouldDisableQuicWhenConnectionTimesOutWithOpenStreams(quic_trial_params);
 
-  if (ShouldQuicEnableAlternativeServicesForDifferentHost(command_line,
-                                                          quic_trial_params)) {
-    params->enable_alternative_service_with_different_host = true;
-    params->parse_alternative_services = true;
-  } else {
-    params->enable_alternative_service_with_different_host = false;
-  }
+  params->enable_alternative_service_with_different_host =
+      ShouldQuicEnableAlternativeServicesForDifferentHost(command_line,
+                                                          quic_trial_params);
 
   if (params->enable_quic) {
     params->quic_always_require_handshake_confirmation =
@@ -1400,16 +1395,10 @@ bool IOThread::NetworkSessionConfigurator::
     ShouldQuicEnableAlternativeServicesForDifferentHost(
         const base::CommandLine& command_line,
         const VariationParameters& quic_trial_params) {
-  // TODO(bnc): Remove inaccurately named "use_alternative_services" parameter.
-  return command_line.HasSwitch(switches::kEnableAlternativeServices) ||
-         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");
 }
 
 // static