Remove more unnecessary ChromeURLRequestContext members.

chrome/browser/io_thread.cc

 // Copyright (c) 2011 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 "chrome/browser/io_thread.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/debug/leak_tracker.h"
@@ skipping 653 matching lines @@
   }
 }
 
 net::SSLConfigService* IOThread::GetSSLConfigService() {
   return ssl_config_service_manager_->Get();
 }
 
 void IOThread::InitSystemRequestContext() {
   if (system_url_request_context_getter_)
     return;
+  // If we're in unit_tests, IOThread may not be run.
+  if (!message_loop())
+    return;
   system_proxy_config_service_.reset(
       ProxyServiceFactory::CreateProxyConfigService(
           pref_proxy_config_tracker_));
   system_url_request_context_getter_ =
       new SystemURLRequestContextGetter(this);
   message_loop()->PostTask(
       FROM_HERE,
       NewRunnableMethod(
           this,
           &IOThread::InitSystemRequestContextOnIOThread));
@@ skipping 24 matching lines @@
   system_params.network_delegate = globals_->system_network_delegate.get();
   system_params.net_log = net_log_;
   globals_->system_http_transaction_factory.reset(
       new net::HttpNetworkLayer(
           new net::HttpNetworkSession(system_params)));
   globals_->system_ftp_transaction_factory.reset(
       new net::FtpNetworkLayer(globals_->host_resolver.get()));
   globals_->system_request_context =
       ConstructSystemRequestContext(globals_, net_log_);
 }