Adds WmWindow and converts WindowState to use it

ash/wm/stacking_controller.cc

 // Copyright (c) 2012 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.
 
 #include "ash/wm/stacking_controller.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/always_on_top_controller.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/window_state.h"
+#include "ash/wm/window_state_aura.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
 namespace {
 
 // Find a root window that matches the |bounds|. If the virtual screen
@@ skipping 107 matching lines @@
   if (window_container_id < kShellWindowId_LockScreenContainer) {
     container = GetContainerById(root, kShellWindowId_SystemModalContainer);
   } else {
     container = GetContainerById(root, kShellWindowId_LockSystemModalContainer);
   }
 
   return container;
 }
 
 }  // namespace ash