Refactors WindowResizers to use ash/wm/common

ash/shelf/shelf_types.h

 // 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.
 
 #ifndef ASH_SHELF_SHELF_TYPES_H_
 #define ASH_SHELF_SHELF_TYPES_H_
 
 // TODO(sky): make callers explicitly include this.
 #include "ash/wm/common/shelf/wm_shelf_types.h"
 
 namespace ash {
 
 enum ShelfAutoHideBehavior {
   // Always auto-hide.
   SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
 
   // Never auto-hide.
   SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
 
   // Always hide.
   SHELF_AUTO_HIDE_ALWAYS_HIDDEN,
 };
 
-enum ShelfVisibilityState {
-  // Always visible.
-  SHELF_VISIBLE,
-
-  // A couple of pixels are reserved at the bottom for the shelf.
-  SHELF_AUTO_HIDE,
-
-  // Nothing is shown. Used for fullscreen windows.
-  SHELF_HIDDEN,
-};
-
 enum ShelfAutoHideState {
   SHELF_AUTO_HIDE_SHOWN,
   SHELF_AUTO_HIDE_HIDDEN,
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_TYPES_H_