Revert of Fix for URL opening code

content/public/test/repeated_notification_observer.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 CONTENT_PUBLIC_TEST_REPEATED_NOTIFICATION_OBSERVER_H_
-#define CONTENT_PUBLIC_TEST_REPEATED_NOTIFICATION_OBSERVER_H_
-
-#include "base/run_loop.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-namespace content {
-
-// RepeatedNotificationObserver allows code to wait until specified number
-// of notifications of particular type are posted.
-class RepeatedNotificationObserver : public NotificationObserver {
- public:
-  RepeatedNotificationObserver(int type, int count);
-
-  // NotificationObserver:
-  void Observe(int type,
-               const NotificationSource& source,
-               const NotificationDetails& details) override;
-
-  // Wait until |count| events of |type| (both specified in constructor) happen.
-  void Wait();
-
- private:
-  int num_outstanding_;
-  NotificationRegistrar registrar_;
-  bool running_;
-  base::RunLoop run_loop_;
-
-  DISALLOW_COPY_AND_ASSIGN(RepeatedNotificationObserver);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_TEST_REPEATED_NOTIFICATION_OBSERVER_H_