Adds WmWindow and converts WindowState to use it

ash/wm/wm_types.h

 // Copyright 2013 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_WM_WM_TYPES_H_
 #define ASH_WM_WM_TYPES_H_
 
 #include "ash/ash_export.h"
 #include "ui/base/ui_base_types.h"
 
+// TODO(sky): move to common.
 namespace ash {
 namespace wm {
 
 // This enum defines both common show state copied from
 // ui::WindowShowState as well as new states introduced in ash.
 // The separate enum is defined here because we don't want to leak
 // these type to ui/base until they're stable and we know for sure
 // that they'll persist over time.
 enum WindowStateType {
   // Common state
@@ skipping 29 matching lines @@
 ASH_EXPORT ui::WindowShowState ToWindowShowState(WindowStateType type);
 
 // Returns true if |type| is WINDOW_STATE_TYPE_MAXIMIZED or
 // WINDOW_STATE_TYPE_FULLSCREEN.
 ASH_EXPORT bool IsMaximizedOrFullscreenWindowStateType(WindowStateType type);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WM_TYPES_H_