Updates shadow when active window changes

mash/wm/property_util.h

 // Copyright 2015 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 MASH_WM_PROPERTY_UTIL_H_
 #define MASH_WM_PROPERTY_UTIL_H_
 
 #include "components/mus/public/interfaces/window_manager.mojom.h"
 #include "components/mus/public/interfaces/window_manager_constants.mojom.h"
 #include "mash/wm/public/interfaces/container.mojom.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace mus {
 class Window;
 }
 
 namespace mash {
 namespace wm {
 
+class Shadow;
+
 // Utility functions to read values from properties & convert them to the
 // appropriate types.
 
 mus::mojom::ShowState GetWindowShowState(const mus::Window* window);
 
 void SetWindowUserSetBounds(mus::Window* window, const gfx::Rect& bounds);
 gfx::Rect GetWindowUserSetBounds(const mus::Window* window);
 
 void SetWindowPreferredSize(mus::Window* window, const gfx::Size& size);
 gfx::Size GetWindowPreferredSize(const mus::Window* window);
 
 mojom::Container GetRequestedContainer(const mus::Window* window);
 
 mus::mojom::ResizeBehavior GetResizeBehavior(const mus::Window* window);
 
 void SetRestoreBounds(mus::Window* window, const gfx::Rect& bounds);
 gfx::Rect GetRestoreBounds(const mus::Window* window);
 
+void SetShadow(mus::Window* window, Shadow* shadow);
+Shadow* GetShadow(mus::Window* window);
+
 }  // namespace wm
 }  // namespace mash
 
 #endif  // MASH_WM_PROPERTY_UTIL_H_