[iOS/GN] Allow compilation with system clang.

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 341 matching lines @@
   globals_->transport_security_state.reset(new net::TransportSecurityState());
 
   std::vector<scoped_refptr<const net::CTLogVerifier>> ct_logs(
       net::ct::CreateLogVerifiersForKnownLogs());
 
   net::MultiLogCTVerifier* ct_verifier = new net::MultiLogCTVerifier();
   globals_->cert_transparency_verifier.reset(ct_verifier);
   // Add built-in logs
   ct_verifier->AddLogs(ct_logs);
 
-  params_.ct_policy_enforcer = new net::CTPolicyEnforcer;
+  globals_->ct_policy_enforcer.reset(new net::CTPolicyEnforcer());
 
   globals_->ssl_config_service = GetSSLConfigService();
 
   CreateDefaultAuthHandlerFactory();
   globals_->http_server_properties.reset(new net::HttpServerPropertiesImpl());
   // In-memory cookie store.
   globals_->system_cookie_store.reset(new net::CookieMonster(nullptr, nullptr));
   // In-memory channel ID store.
   globals_->system_channel_id_service.reset(
       new net::ChannelIDService(new net::DefaultChannelIDStore(nullptr),
@@ skipping 150 matching lines @@
   context->set_host_resolver(globals->host_resolver.get());
   context->set_cert_verifier(globals->cert_verifier.get());
   context->set_transport_security_state(
       globals->transport_security_state.get());
   context->set_cert_transparency_verifier(
       globals->cert_transparency_verifier.get());
   context->set_ssl_config_service(globals->ssl_config_service.get());
   context->set_http_auth_handler_factory(
       globals->http_auth_handler_factory.get());
   context->set_proxy_service(globals->system_proxy_service.get());
+  context->set_ct_policy_enforcer(globals->ct_policy_enforcer.get());
 
   net::URLRequestJobFactoryImpl* system_job_factory =
       new net::URLRequestJobFactoryImpl();
   // Data URLs are always loaded through the system request context on iOS
   // (due to UIWebView limitations).
   bool set_protocol = system_job_factory->SetProtocolHandler(
       url::kDataScheme, base::WrapUnique(new net::DataProtocolHandler()));
   DCHECK(set_protocol);
   globals->system_url_request_job_factory.reset(system_job_factory);
   context->set_job_factory(globals->system_url_request_job_factory.get());
@@ skipping 15 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;
 }