Move app list from ash to ui.

ash/app_list/pagination_model_observer.h

-// Copyright (c) 2012 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 ASH_APP_LIST_PAGINATION_MODEL_OBSERVER_H_
-#define ASH_APP_LIST_PAGINATION_MODEL_OBSERVER_H_
-#pragma once
-
-#include "ash/ash_export.h"
-
-namespace ash {
-
-class ASH_EXPORT PaginationModelObserver {
- public:
-  // Invoked when the total number of page is changed.
-  virtual void TotalPagesChanged() = 0;
-
-  // Invoked when the selected page index is changed.
-  virtual void SelectedPageChanged(int old_selected, int new_selected) = 0;
-
- protected:
-  virtual ~PaginationModelObserver() {}
-};
-
-}  // namespace ash
-
-#endif  // ASH_APP_LIST_PAGINATION_MODEL_OBSERVER_H_