Add support for native extension notifications

chrome/browser/extensions/api/notifications/extension_notification_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_EXTENSION_NOTIFICATION_HANDLER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_EXTENSION_NOTIFICATION_HANDLER_H_
 
 #include "base/macros.h"
-#include "chrome/browser/notifications/notification_handler.h"
+#include "chrome/browser/notifications/non_persistent_notification_handler.h"
 
 // Handler for notifications shown by extensions. Will be created and owned by
 // the NotificationDisplayService.
-class ExtensionNotificationHandler : public NotificationHandler {
+class ExtensionNotificationHandler : public NonPersistentNotificationHandler {

[Peter Beverloo, 2017/04/07 02:26:53]

Hmm. I like the idea of reasoning about extension notifications as
non-persistent notifications as it describes their behaviour. At some point we
could update them to be persistent notifications.

[Miguel Garcia, 2017/04/07 13:32:06]

Acknowledged.

  public:
   ExtensionNotificationHandler();
   ~ExtensionNotificationHandler() override;
 
-  // NotificationHandler implementation.
-  void OnClose(Profile* profile,
-               const std::string& origin,
-               const std::string& notification_id,
-               bool by_user) override;
-  void OnClick(Profile* profile,
-               const std::string& origin,
-               const std::string& notification_id,
-               int action_index,
-               const base::NullableString16& reply) override;
   void OpenSettings(Profile* profile) override;
-  void RegisterNotification(const std::string& notification_id,
-                            NotificationDelegate* delegate) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ExtensionNotificationHandler);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_EXTENSION_NOTIFICATION_HANDLER_H_