mash: Move more shelf files to ash/common/shelf.

ash/wm/status_area_layout_manager.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_WM_STATUS_AREA_LAYOUT_MANAGER_H_
-#define ASH_WM_STATUS_AREA_LAYOUT_MANAGER_H_
-
-#include "ash/common/wm/wm_snap_to_pixel_layout_manager.h"
-#include "base/macros.h"
-
-namespace ash {
-
-class ShelfWidget;
-
-// StatusAreaLayoutManager is a layout manager responsible for the status area.
-// In any case when status area needs relayout it redirects this call to
-// ShelfLayoutManager.
-class StatusAreaLayoutManager : public wm::WmSnapToPixelLayoutManager {
- public:
-  explicit StatusAreaLayoutManager(ShelfWidget* shelf_widget);
-  ~StatusAreaLayoutManager() override;
-
-  // Overridden from wm::WmSnapToPixelLayoutManager:
-  void OnWindowResized() override;
-  void SetChildBounds(WmWindow* child,
-                      const gfx::Rect& requested_bounds) override;
-
- private:
-  // Updates layout of the status area. Effectively calls ShelfLayoutManager
-  // to update layout of the shelf.
-  void LayoutStatusArea();
-
-  // True when inside LayoutStatusArea method.
-  // Used to prevent calling itself again from SetChildBounds().
-  bool in_layout_;
-
-  ShelfWidget* shelf_widget_;
-
-  DISALLOW_COPY_AND_ASSIGN(StatusAreaLayoutManager);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_STATUS_AREA_LAYOUT_MANAGER_H_