Remove |parse_alternative_service| flag.

components/cronet/ios/cronet_environment.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/cronet/ios/cronet_environment.h"
 
 #include <utility>
 
 #include "base/at_exit.h"
 #include "base/atomicops.h"
@@ skipping 304 matching lines @@
   params.host_resolver = main_context_->host_resolver();
   params.cert_verifier = main_context_->cert_verifier();
   params.channel_id_service = main_context_->channel_id_service();
   params.transport_security_state = main_context_->transport_security_state();
   params.proxy_service = main_context_->proxy_service();
   params.ssl_config_service = main_context_->ssl_config_service();
   params.http_auth_handler_factory = main_context_->http_auth_handler_factory();
   params.http_server_properties = main_context_->http_server_properties();
   params.net_log = main_context_->net_log();
   params.enable_http2 = http2_enabled();
-  params.parse_alternative_services = true;
   params.enable_quic = quic_enabled();
 
   for (const auto& quic_hint : quic_hints_) {
     net::AlternativeService alternative_service(net::AlternateProtocol::QUIC,
                                                 "", quic_hint.port());
     url::SchemeHostPort quic_hint_server("https", quic_hint.host(),
                                          quic_hint.port());
     main_context_->http_server_properties()->SetAlternativeService(
         quic_hint_server, alternative_service, base::Time::Max());
     params.quic_host_whitelist.insert(quic_hint.host());
@@ skipping 28 matching lines @@
   const net::HttpUserAgentSettings* user_agent_settings =
       main_context_->http_user_agent_settings();
   if (!user_agent_settings) {
     return nullptr;
   }
 
   return user_agent_settings->GetUserAgent();
 }
 
 }  // namespace cronet