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

net/http/http_server_properties_manager.cc

 // Copyright 2014 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 "net/http/http_server_properties_manager.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 55 matching lines @@
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 //  HttpServerPropertiesManager
 
 HttpServerPropertiesManager::PrefDelegate::~PrefDelegate() {}
 
 HttpServerPropertiesManager::HttpServerPropertiesManager(
     PrefDelegate* pref_delegate,
+    scoped_refptr<base::SingleThreadTaskRunner> pref_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> network_task_runner)
-    : pref_task_runner_(base::ThreadTaskRunnerHandle::Get()),
+    : pref_task_runner_(pref_task_runner),
       pref_delegate_(pref_delegate),
       setting_prefs_(false),
       network_task_runner_(network_task_runner) {
   DCHECK(pref_delegate_);
   pref_weak_ptr_factory_.reset(
       new base::WeakPtrFactory<HttpServerPropertiesManager>(this));
   pref_weak_ptr_ = pref_weak_ptr_factory_->GetWeakPtr();
   pref_cache_update_timer_.reset(new base::OneShotTimer);
+  pref_cache_update_timer_->SetTaskRunner(pref_task_runner_);
   pref_delegate_->StartListeningForUpdates(
       base::Bind(&HttpServerPropertiesManager::OnHttpServerPropertiesChanged,
                  base::Unretained(this)));
 }
 
 HttpServerPropertiesManager::~HttpServerPropertiesManager() {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
   network_weak_ptr_factory_.reset();
 }
 
@@ skipping 1019 matching lines @@
                                                        quic_servers_dict);
 }
 
 void HttpServerPropertiesManager::OnHttpServerPropertiesChanged() {
   DCHECK(pref_task_runner_->RunsTasksOnCurrentThread());
   if (!setting_prefs_)
     ScheduleUpdateCacheOnPrefThread();
 }
 
 }  // namespace net