Pass pref_task_runner through HttpServerPropertiesManager's cxtor so that tests could inject a Test…

ios/chrome/browser/net/http_server_properties_manager_factory.cc

 // 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/net/http_server_properties_manager_factory.h"
 
+#include "base/threading/thread_task_runner_handle.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/pref_change_registrar.h"
 #include "components/prefs/pref_service.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/web/public/web_thread.h"
 #include "net/http/http_server_properties_manager.h"
 
 namespace {
 
 class PrefServiceAdapter
@@ skipping 33 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(PrefServiceAdapter);
 };
 
 }  // namespace
 
 // static
 net::HttpServerPropertiesManager*
 HttpServerPropertiesManagerFactory::CreateManager(PrefService* pref_service) {
   return new net::HttpServerPropertiesManager(
       new PrefServiceAdapter(pref_service),  // Transfers ownership.
+      base::ThreadTaskRunnerHandle::Get(),
       web::WebThread::GetTaskRunnerForThread(web::WebThread::IO));
 }
 
 // static
 void HttpServerPropertiesManagerFactory::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterDictionaryPref(prefs::kHttpServerProperties);
 }