Removed webui_generator and new OOBE UI placeholder.

chrome/browser/chromeos/oobe/oobe.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 CHROME_BROWSER_CHROMEOS_OOBE_OOBE_H_
-#define CHROME_BROWSER_CHROMEOS_OOBE_OOBE_H_
-
-#include "base/macros.h"
-#include "ui/oobe/declarations/oobe_view_model.h"
-
-namespace chromeos {
-
-class Oobe : public gen::OobeViewModel {
- public:
-  Oobe();
-  ~Oobe() override;
-
-  static void Register();
-
-  // Overridden from wug::ViewModel:
-  void Initialize() override;
-
- private:
-  void OnButtonClicked() override;
-
-  DISALLOW_COPY_AND_ASSIGN(Oobe);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_OOBE_OOBE_H_