Support persistent notifications in the PlatformNotificationServiceImpl.

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 "chrome/browser/notifications/notification_delegate.h"
+#include "content/public/common/show_desktop_notification_params.h"
+
+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 NotificationDelegate {
+ public:
+  PersistentNotificationDelegate(
+      content::BrowserContext* browser_context,
+      int64 service_worker_registration_id,
+      const content::ShowDesktopNotificationHostMsgParams& params);
+
+  // NotificationDelegate implementation.
+  void Display() override;
+  void Close(bool by_user) override;
+  void Click() override;
+  std::string id() const override;
+
+ protected:
+  ~PersistentNotificationDelegate() override;
+
+ private:
+  content::BrowserContext* browser_context_;
+  int64 service_worker_registration_id_;
+  content::ShowDesktopNotificationHostMsgParams notification_data_;
+
+  std::string id_;
+};
+
+#endif  // CHROME_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_