chromeos: Move files in //ash/common to //ash, part 2

ash/common/wm_layout_manager.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_LAYOUT_MANAGER_H_
-#define ASH_COMMON_WM_LAYOUT_MANAGER_H_
-
-#include "ash/ash_export.h"
-
-namespace gfx {
-class Rect;
-}
-
-namespace ash {
-
-class WmWindow;
-
-// Used to position the child WmWindows of a WmWindow. WmLayoutManager is called
-// at key points in a WmWindows life cycle thats allow sthe WmLayoutManager to
-// position or change child WmWindows.
-class ASH_EXPORT WmLayoutManager {
- public:
-  virtual ~WmLayoutManager() {}
-
-  // Invoked when the window the WmLayoutManager is associated with is resized.
-  virtual void OnWindowResized() = 0;
-
-  // Invoked when a window is added to the window the WmLayoutManager is
-  // associated with.
-  virtual void OnWindowAddedToLayout(WmWindow* child) = 0;
-
-  // Invoked prior to removing |child|.
-  virtual void OnWillRemoveWindowFromLayout(WmWindow* child) = 0;
-
-  // Invoked after removing |child|.
-  virtual void OnWindowRemovedFromLayout(WmWindow* child) = 0;
-
-  // Invoked when SetVisible() is invoked on |child|. |visible| is the value
-  // supplied to SetVisible(). If |visible| is true, child->IsVisible() may
-  // still return false. See description in aura::Window::IsVisible() for
-  // details.
-  virtual void OnChildWindowVisibilityChanged(WmWindow* child,
-                                              bool visibile) = 0;
-
-  // Invoked when WmWindow::SetBounds() is called on |child|. This allows the
-  // WmLayoutManager to modify the bounds as appropriate before processing the
-  // request, including ignoring the request. Implementation must call
-  // SetChildBoundsDirect() so that an infinite loop does not result.
-  virtual void SetChildBounds(WmWindow* child,
-                              const gfx::Rect& requested_bounds) = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_WM_LAYOUT_MANAGER_H_