Minimize the delegate dependencies for non persistent notifications.

content/browser/notifications/notification_message_filter.h

 // 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.
 
 #ifndef CONTENT_BROWSER_NOTIFICATIONS_NOTIFICATION_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_NOTIFICATIONS_NOTIFICATION_MESSAGE_FILTER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 118 matching lines @@
   // cases where the renderer shouldn't send messages if it weren't the case. If
   // no permission has been granted, a bad message has been received and the
   // renderer should be killed accordingly.
   bool VerifyNotificationPermissionGranted(PlatformNotificationService* service,
                                            const GURL& origin);
 
   // Returns the NotificationIdGenerator instance owned by the context.
   NotificationIdGenerator* GetNotificationIdGenerator() const;
 
   int process_id_;
+  bool non_persistent__notification_shown_;
   scoped_refptr<PlatformNotificationContextImpl> notification_context_;
   ResourceContext* resource_context_;
   scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
   BrowserContext* browser_context_;
 
   // Map mapping notification IDs associated with non-persistent notifications
   // to the closures that may be used for programmatically closing them.
   std::unordered_map<std::string, base::Closure> close_closures_;
 
   base::WeakPtrFactory<NotificationMessageFilter> weak_factory_io_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_NOTIFICATIONS_NOTIFICATION_MESSAGE_FILTER_H_