Move some more files into ash... this time seed the window manager dir.

ui/aura_shell/shadow.h

-// Copyright (c) 2011 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 UI_AURA_SHELL_SHADOW_H_
-#define UI_AURA_SHELL_SHADOW_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura_shell/aura_shell_export.h"
-#include "ui/gfx/rect.h"
-
-namespace ui {
-class Layer;
-}  // namespace ui
-
-namespace aura_shell {
-namespace internal {
-
-class ImageGrid;
-
-// Simple class that draws a drop shadow around content at given bounds.
-class AURA_SHELL_EXPORT Shadow {
- public:
-  Shadow();
-  ~Shadow();
-
-  // Returns |image_grid_|'s ui::Layer.  This is exposed so it can be added to
-  // the same layer as the content and stacked below it.  SetContentBounds()
-  // should be used to adjust the shadow's size and position (rather than
-  // applying transformations to this layer).
-  ui::Layer* layer() const;
-
-  const gfx::Rect& content_bounds() const { return content_bounds_; }
-
-  void Init();
-
-  // Moves and resizes |image_grid_| to frame |content_bounds|.
-  void SetContentBounds(const gfx::Rect& content_bounds);
-
- private:
-  scoped_ptr<ImageGrid> image_grid_;
-
-  // Bounds of the content that the shadow encloses.
-  gfx::Rect content_bounds_;
-
-  DISALLOW_COPY_AND_ASSIGN(Shadow);
-};
-
-}  // namespace internal
-}  // namespace aura_shell
-
-#endif  // UI_AURA_SHELL_SHADOW_H_