mash: Support ShelfWindowWatcher via ShelfItem properties.

ash/common/wm_window_property.h

 // Copyright 2016 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_COMMON_WM_WINDOW_PROPERTY_H_
 #define ASH_COMMON_WM_WINDOW_PROPERTY_H_
 
 namespace ash {
 
 enum class WmWindowProperty {
   // Type bool.
   ALWAYS_ON_TOP,
 
   // Type bool. See aura::client:kExcludeFromMruKey for details.
   EXCLUDE_FROM_MRU,
 
   // Type int, but cast to ui::ModalType.
   MODAL_TYPE,
 
   // Type int.
+  SHELF_ICON_ID,

[James Cook, 2016/09/29 02:49:46]

I would also rename this SHELF_ICON_RESOURCE_ID to match the others. Sorry I
didn't suggest that before. And yes, it will make more lines wrap. :-(

[msw, 2016/09/29 06:23:36]

Done. Clarity is more important than brevity :-)

+
+  // Type int.
   SHELF_ID,
 
-  // Type ShelfItemDetails.
-  SHELF_ITEM_DETAILS,
+  // Type int, but cast to ShelfItemType.
+  SHELF_ITEM_TYPE,
 
   // Type bool.
   SNAP_CHILDREN_TO_PIXEL_BOUNDARY,
 
   // Type SkColor. See aura::client::kTopViewColor for details.
   TOP_VIEW_COLOR,
 
   // Type int. See aura::client::kTopViewInset for details.
   TOP_VIEW_INSET,
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_WINDOW_PROPERTY_H_