Updates shadow when active window changes

mash/wm/window_manager_application.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_WINDOW_MANAGER_APPLICATION_H_
 #define MASH_WM_WINDOW_MANAGER_APPLICATION_H_
 
 #include <set>
 
 #include "base/macros.h"
@@ skipping 19 matching lines @@
 
 namespace views {
 class AuraInit;
 }
 
 namespace mash {
 namespace wm {
 
 class AcceleratorRegistrarImpl;
 class BackgroundLayout;
+class ShadowController;
 class ShelfLayout;
 class WindowLayout;
 class WindowManagerImpl;
 
 class WindowManagerApplication
     : public mojo::ApplicationDelegate,
       public mus::WindowObserver,
       public mus::mojom::WindowTreeHostClient,
       public mus::WindowTreeDelegate,
       public mojo::InterfaceFactory<mus::mojom::WindowManager>,
@@ skipping 66 matching lines @@
   // |window_manager_| is created once OnEmbed() is called. Until that time
   // |requests_| stores any pending WindowManager interface requests.
   scoped_ptr<WindowManagerImpl> window_manager_;
   mojo::WeakBindingSet<mus::mojom::WindowManager> window_manager_binding_;
   ScopedVector<mojo::InterfaceRequest<mus::mojom::WindowManager>> requests_;
 
   scoped_ptr<BackgroundLayout> background_layout_;
   scoped_ptr<ShelfLayout> shelf_layout_;
   scoped_ptr<WindowLayout> window_layout_;
 
+  scoped_ptr<ShadowController> shadow_controller_;
+
   std::set<AcceleratorRegistrarImpl*> accelerator_registrars_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerApplication);
 };
 
 }  // namespace wm
 }  // namespace mash
 
 #endif  // MASH_WM_WINDOW_MANAGER_APPLICATION_H_