Remove |parse_alternative_service| flag.

components/network_session_configurator/network_session_configurator.cc

Index: components/network_session_configurator/network_session_configurator.cc
diff --git a/components/network_session_configurator/network_session_configurator.cc b/components/network_session_configurator/network_session_configurator.cc
index 4e344e4fd3ab2ceeeff750f9d89cefdf4aeb5011..f2736932faec635a0c188c84286a6e8b51ca6d47 100644
--- a/components/network_session_configurator/network_session_configurator.cc
+++ b/components/network_session_configurator/network_session_configurator.cc
@@ -45,20 +45,6 @@ const char kSpdyFieldTrialSpdy31GroupNamePrefix[] = "Spdy31Enabled";
 const char kSpdyFieldTrialSpdy4GroupNamePrefix[] = "Spdy4Enabled";
 const char kSpdyFieldTrialParametrizedPrefix[] = "Parametrized";
 
-// The AltSvc trial controls whether Alt-Svc headers are parsed.
-// Disabled:
-//     Alt-Svc headers are not parsed.
-//     Alternate-Protocol headers are parsed.
-// Enabled:
-//     Alt-Svc headers are parsed, but only same-host entries are used by
-//     default.  (Use "enable_alternative_service_with_different_host" QUIC
-//     parameter to enable entries with different hosts.)
-//     Alternate-Protocol headers are ignored for responses that have an Alt-Svc
-//     header.
-const char kAltSvcFieldTrialName[] = "ParseAltSvc";
-const char kAltSvcFieldTrialDisabledPrefix[] = "AltSvcDisabled";
-const char kAltSvcFieldTrialEnabledPrefix[] = "AltSvcEnabled";
-
 // Field trial for NPN.
 const char kNpnTrialName[] = "NPN";
 const char kNpnTrialEnabledGroupNamePrefix[] = "Enable";
@@ -154,18 +140,6 @@ void ConfigureSpdyParams(const base::CommandLine& command_line,
   }
 }
 
-void ConfigureAltSvcParams(const base::CommandLine& command_line,
-                           base::StringPiece altsvc_trial_group,
-                           net::HttpNetworkSession::Params* params) {
-  if (altsvc_trial_group.starts_with(kAltSvcFieldTrialEnabledPrefix)) {
-    params->parse_alternative_services = true;
-    return;
-  }
-  if (altsvc_trial_group.starts_with(kAltSvcFieldTrialDisabledPrefix)) {
-    params->parse_alternative_services = false;
-  }
-}
-
 void ConfigureNPNParams(const base::CommandLine& command_line,
                         base::StringPiece npn_trial_group,
                         net::HttpNetworkSession::Params* params) {
@@ -547,10 +521,6 @@ void ParseFieldTrialsAndCommandLineInternal(
   // The command line flags will be associated with a group that is reported so
   // long as trial is actually queried.
 
-  std::string altsvc_trial_group =
-      base::FieldTrialList::FindFullName(kAltSvcFieldTrialName);
-  ConfigureAltSvcParams(command_line, altsvc_trial_group, params);
-
   std::string quic_trial_group =
       base::FieldTrialList::FindFullName(kQuicFieldTrialName);
   VariationParameters quic_trial_params;