mash: Move ash/common/wm/shelf to ash/common/shelf

ash/common/wm/shelf/wm_shelf.h

-// Copyright 2016 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_COMMON_WM_SHELF_WM_SHELF_H_
-#define ASH_COMMON_WM_SHELF_WM_SHELF_H_
-
-#include "ash/ash_export.h"
-#include "ash/common/wm/shelf/wm_shelf_types.h"
-
-namespace gfx {
-class Rect;
-}
-
-namespace ash {
-namespace wm {
-
-class WmShelfObserver;
-class WmWindow;
-
-// Used for accessing global state.
-class ASH_EXPORT WmShelf {
- public:
-  // Returns the window showing the shelf.
-  virtual WmWindow* GetWindow() = 0;
-
-  virtual ShelfAlignment GetAlignment() const = 0;
-
-  virtual ShelfBackgroundType GetBackgroundType() const = 0;
-
-  virtual void UpdateVisibilityState() = 0;
-
-  virtual ShelfVisibilityState GetVisibilityState() const = 0;
-
-  virtual void UpdateIconPositionForWindow(WmWindow* window) = 0;
-
-  // Returns the screen bounds of the item for the specified window. If there is
-  // no item for the specified window an empty rect is returned.
-  virtual gfx::Rect GetScreenBoundsOfItemIconForWindow(
-      wm::WmWindow* window) = 0;
-
-  virtual void AddObserver(WmShelfObserver* observer) = 0;
-  virtual void RemoveObserver(WmShelfObserver* observer) = 0;
-
- protected:
-  virtual ~WmShelf() {}
-};
-
-}  // namespace wm
-}  // namespace ash
-
-#endif  // ASH_COMMON_WM_SHELF_WM_SHELF_H_