Remove |parse_alternative_service| flag.

components/network_session_configurator/network_session_configurator.cc

 // Copyright 2016 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 "components/network_session_configurator/network_session_configurator.h"
 
 #include <map>
 
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 27 matching lines @@
 //  operators to do feature detection rather than UA-sniffing. As such, this
 //  trial runs continuously.
 //  * A SPDY/4 experiment, for SPDY/4 (aka HTTP/2) vs SPDY/3.1 comparisons and
 //  eventual SPDY/4 deployment.
 const char kSpdyFieldTrialName[] = "SPDY";
 const char kSpdyFieldTrialHoldbackGroupNamePrefix[] = "SpdyDisabled";
 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";
 const char kNpnTrialDisabledGroupNamePrefix[] = "Disable";
 
 // Field trial for priority dependencies.
 const char kSpdyDependenciesFieldTrial[] = "SpdyEnableDependencies";
 const char kSpdyDependenciesFieldTrialEnable[] = "Enable";
 const char kSpdyDepencenciesFieldTrialDisable[] = "Disable";
 
@@ skipping 75 matching lines @@
       params->enable_spdy31 = true;
     }
     // TODO(bnc): https://crbug.com/521597
     // HttpStreamFactory::spdy_enabled_ is redundant with params->enable_http2
     // and enable_spdy31, can it be eliminated?
     net::HttpStreamFactory::set_spdy_enabled(spdy_enabled);
     return;
   }
 }
 
-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) {
   if (npn_trial_group.starts_with(kNpnTrialEnabledGroupNamePrefix)) {
     params->enable_npn = true;
   } else if (npn_trial_group.starts_with(kNpnTrialDisabledGroupNamePrefix)) {
     params->enable_npn = false;
   }
 }
 
@@ skipping 361 matching lines @@
   }
   if (command_line.HasSwitch(switches::kTestingFixedHttpsPort)) {
     params->testing_fixed_https_port =
         GetSwitchValueAsInt(command_line, switches::kTestingFixedHttpsPort);
   }
 
   // Always fetch the field trial groups to ensure they are reported correctly.
   // 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;
   if (!variations::GetVariationParams(kQuicFieldTrialName, &quic_trial_params))
     quic_trial_params.clear();
   ConfigureQuicParams(command_line, quic_trial_group, quic_trial_params,
                       is_quic_allowed_by_policy, quic_user_agent_id, params);
 
   if (!is_spdy_allowed_by_policy) {
     base::FieldTrial* trial = base::FieldTrialList::Find(kSpdyFieldTrialName);
@@ skipping 40 matching lines @@
                                     const std::string& quic_user_agent_id,
                                     net::HttpNetworkSession::Params* params) {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   ParseFieldTrialsAndCommandLineInternal(
       command_line, is_spdy_allowed_by_policy, is_quic_allowed_by_policy,
       quic_user_agent_id, params);
 }
 
 }  // namespace network_session_configurator