Use notification display service to collect persistent notifications.

content/public/browser/platform_notification_service.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_PUBLIC_BROWSER_PLATFORM_NOTIFICATION_SERVICE_H_
 #define CONTENT_PUBLIC_BROWSER_PLATFORM_NOTIFICATION_SERVICE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 60 matching lines @@
       const GURL& origin,
       const PlatformNotificationData& notification_data,
       const NotificationResources& notification_resources) = 0;
 
   // Closes the persistent notification identified by
   // |persistent_notification_id|. This method must be called on the UI thread.
   virtual void ClosePersistentNotification(
       BrowserContext* browser_context,
       const std::string& notification_id) = 0;
 
-  // Writes the ids of all currently displaying persistent notifications for the
+  // Writes the ids of all currently displaying notifications for the
   // given |browser_context| to |displayed_notifications|. Returns whether the
   // platform is able to provide such a set.
-  virtual bool GetDisplayedPersistentNotifications(
+  virtual bool GetDisplayedNotifications(
       BrowserContext* browser_context,
       std::set<std::string>* displayed_notifications) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PLATFORM_NOTIFICATION_SERVICE_H_