Migrate extension notifications to the new NotificationDisplayService

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

Index: chrome/browser/extensions/api/notifications/extension_notification_handler.h
diff --git a/chrome/browser/extensions/api/notifications/extension_notification_handler.h b/chrome/browser/extensions/api/notifications/extension_notification_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..9d6985ff7e86baffb96f536e775f17e55857d030
--- /dev/null
+++ b/chrome/browser/extensions/api/notifications/extension_notification_handler.h
@@ -0,0 +1,25 @@
+// 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/non_persistent_notification_handler.h"
+
+// Handler for notifications shown by extensions. Will be created and owned by
+// the NotificationDisplayService.
+class ExtensionNotificationHandler : public NonPersistentNotificationHandler {
+ public:
+  ExtensionNotificationHandler();
+  ~ExtensionNotificationHandler() override;
+
+  // NotificationHandler implementation.
+  void OpenSettings(Profile* profile) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ExtensionNotificationHandler);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_EXTENSION_NOTIFICATION_HANDLER_H_