Deprecate per notification type delegates.

chrome/browser/notifications/persistent_notification_delegate.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 CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_
-#define CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "chrome/browser/notifications/web_notification_delegate.h"
-
-class GURL;
-
-namespace content {
-class BrowserContext;
-}
-
-// Delegate responsible for listening to the click event on persistent
-// notifications, to forward them to the PlatformNotificationService so that
-// JavaScript events can be fired on the associated Service Worker.
-class PersistentNotificationDelegate : public WebNotificationDelegate {
- public:
-  PersistentNotificationDelegate(content::BrowserContext* browser_context,
-                                 const std::string& notification_id,
-                                 const GURL& origin,
-                                 int notification_settings_index);
-
-  // NotificationDelegate implementation.
-  void Display() override;
-  void Close(bool by_user) override;
-  void Click() override;
-  void ButtonClick(int button_index) override;
-  void ButtonClickWithReply(int button_index,
-                            const base::string16& reply) override;
-
- protected:
-  ~PersistentNotificationDelegate() override;
-
- private:
-  int notification_settings_index_;
-
-  DISALLOW_COPY_AND_ASSIGN(PersistentNotificationDelegate);
-};
-
-#endif  // CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_