Retrive displayed notifications asynchronously

chrome/browser/notifications/platform_notification_service_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 "chrome/browser/notifications/platform_notification_service_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 365 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   Profile* profile = Profile::FromBrowserContext(browser_context);
   if (!profile || profile->AsTestingProfile())
     return false;  // Tests will not have a message center.
 
   return GetNotificationDisplayService(profile)->GetDisplayed(
       displayed_notifications);
 }
 
+void PlatformNotificationServiceImpl::GetDisplayedNotificationsAsync(
+    BrowserContext* browser_context,
+    const NotificationCommon::NotificationResultCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  Profile* profile = Profile::FromBrowserContext(browser_context);
+  if (!profile || profile->AsTestingProfile())
+    return;  // Tests will not have a message center.
+
+  GetNotificationDisplayService(profile)->GetDisplayedAsync(callback);
+}
+
 void PlatformNotificationServiceImpl::OnClickEventDispatchComplete(
     content::PersistentNotificationStatus status) {
   UMA_HISTOGRAM_ENUMERATION(
       "Notifications.PersistentWebNotificationClickResult", status,
       content::PersistentNotificationStatus::
           PERSISTENT_NOTIFICATION_STATUS_MAX);
 #if BUILDFLAG(ENABLE_BACKGROUND)
   DCHECK_GT(pending_click_dispatch_events_, 0);
   if (--pending_click_dispatch_events_ == 0) {
     click_dispatch_keep_alive_.reset();
@@ skipping 116 matching lines @@
   }
 #endif
 
   return base::string16();
 }
 
 void PlatformNotificationServiceImpl::SetNotificationDisplayServiceForTesting(
     NotificationDisplayService* display_service) {
   test_display_service_ = display_service;
 }