Move Singleton and related structs to namespace base

content/browser/notifications/notification_event_dispatcher_impl.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/browser/notifications/notification_event_dispatcher_impl.h"
 
 #include "base/callback.h"
 #include "content/browser/notifications/platform_notification_context_impl.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/browser/service_worker/service_worker_registration.h"
@@ skipping 159 matching lines @@
 }  // namespace
 
 // static
 NotificationEventDispatcher* NotificationEventDispatcher::GetInstance() {
   return NotificationEventDispatcherImpl::GetInstance();
 }
 
 NotificationEventDispatcherImpl*
 NotificationEventDispatcherImpl::GetInstance() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  return Singleton<NotificationEventDispatcherImpl>::get();
+  return base::Singleton<NotificationEventDispatcherImpl>::get();
 }
 
 NotificationEventDispatcherImpl::NotificationEventDispatcherImpl() {}
 
 NotificationEventDispatcherImpl::~NotificationEventDispatcherImpl() {}
 
 void NotificationEventDispatcherImpl::DispatchNotificationClickEvent(
     BrowserContext* browser_context,
     int64_t persistent_notification_id,
     const GURL& origin,
@@ skipping 20 matching lines @@
       base::Bind(&ReadNotificationDatabaseData,
                  persistent_notification_id,
                  origin,
                  action_index,
                  dispatch_complete_callback,
                  service_worker_context,
                  notification_context));
 }
 
 }  // namespace content