[NOT FOR REVIEW] Significantly simplify the PlatformNotificationService //content API.

content/browser/notifications/persistent_notification_delegate.h

+// Copyright 2015 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 CONTENT_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_
+#define CONTENT_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_
+
+#include <stdint.h>
+
+#include "ui/message_center/notification_delegate.h"
+#include "url/gurl.h"
+
+namespace content {
+
+class BrowserContext;
+
+//
+class PersistentNotificationDelegate
+    : public message_center::NotificationDelegate {
+ public:
+  PersistentNotificationDelegate(BrowserContext* browser_context,
+                                 const GURL& origin,
+                                 int64_t persistent_notification_id);
+
+  // message_center::NotificationDelegate implementation.
+  void Display() override {}
+  void Close(bool by_user) override;
+  bool HasClickedListener() override;
+  void Click() override;
+  void ButtonClick(int button_index) override {}
+
+ private:
+  ~PersistentNotificationDelegate() override;
+
+  BrowserContext* browser_context_;
+  GURL origin_;
+  int64_t persistent_notification_id_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_NOTIFICATIONS_PERSISTENT_NOTIFICATION_DELEGATE_H_