Add support for native extension notifications

chrome/browser/extensions/api/notifications/extension_notification_display_helper.cc

 // Copyright 2017 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/extensions/api/notifications/extension_notification_display_helper.h"
 
 #include <algorithm>
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 62 matching lines @@
 bool ExtensionNotificationDisplayHelper::Close(
     const std::string& notification_id) {
   if (!EraseDataForNotificationId(notification_id))
     return false;
 
   GetDisplayService()->Close(NotificationCommon::EXTENSION, notification_id);
   return true;
 }
 
 void ExtensionNotificationDisplayHelper::Shutdown() {
-  for (const std::unique_ptr<Notification>& notification : notifications_) {
-    GetDisplayService()->Close(NotificationCommon::EXTENSION,
-                               notification->delegate_id());
-  }
+  // Do not call GetDisplayService()->Close() here.
+  // This is called upon profile destruction and closing a notification
+  // requires a profile. Both the message center and the bridge
+  // notificatiosn will clean up notifications upon exit so all
+  // that is needed here is cleaning up the internal state.
 
   notifications_.clear();
 }
 
 NotificationDisplayService*
 ExtensionNotificationDisplayHelper::GetDisplayService() {
   return NotificationDisplayServiceFactory::GetForProfile(profile_);
 }
 
 }  // namespace extensions