worker: Use standard task-runners to run notification image loader callbacks.

content/child/notifications/notification_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 "content/child/notifications/notification_manager.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/threading/thread_local.h"
 #include "content/child/notifications/notification_data_conversions.h"
 #include "content/child/notifications/notification_dispatcher.h"
 #include "content/child/notifications/notification_image_loader.h"
 #include "content/child/service_worker/web_service_worker_registration_impl.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/child/worker_task_runner.h"
 #include "content/common/platform_notification_messages.h"
 #include "content/public/common/platform_notification_data.h"
 #include "third_party/WebKit/public/platform/WebNotificationData.h"
@@ skipping 186 matching lines @@
   iter->second->dispatchClickEvent();
 }
 
 scoped_refptr<NotificationImageLoader> NotificationManager::CreateImageLoader(
     const blink::WebURL& image_url,
     const NotificationImageLoadedCallback& callback) const {
   scoped_refptr<NotificationImageLoader> pending_notification(
       new NotificationImageLoader(callback));
 
   main_thread_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&NotificationImageLoader::StartOnMainThread,
-                 pending_notification,
-                 image_url,
-                 CurrentWorkerId()));
+      FROM_HERE, base::Bind(&NotificationImageLoader::StartOnMainThread,
+                            pending_notification, image_url,
+                            base::ThreadTaskRunnerHandle::Get()));
 
   return pending_notification;
 }
 
 void NotificationManager::DisplayNotification(
     const blink::WebSerializedOrigin& origin,
     const blink::WebNotificationData& notification_data,
     blink::WebNotificationDelegate* delegate,
     scoped_refptr<NotificationImageLoader> image_loader) {
   int notification_id =
@@ skipping 50 matching lines @@
     blink::WebNotificationDelegate* delegate) {
   const auto& iter = pending_page_notifications_.find(delegate);
   if (iter == pending_page_notifications_.end())
     return false;
 
   pending_page_notifications_.erase(iter);
   return true;
 }
 
 }  // namespace content