mash: Support ShelfWindowWatcher via ShelfItem properties.

ash/common/shelf/shelf_item_types.h

Index: ash/common/shelf/shelf_item_types.h
diff --git a/ash/common/shelf/shelf_item_types.h b/ash/common/shelf/shelf_item_types.h
index 68fd849c5dc9a2ec87492bb6f67d306dc2fd45be..02a8a5a827548504e90426b25bf05ace1b37104e 100644
--- a/ash/common/shelf/shelf_item_types.h
+++ b/ash/common/shelf/shelf_item_types.h
@@ -9,7 +9,6 @@
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_constants.h"
-#include "base/strings/string16.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace ash {
@@ -76,21 +75,6 @@ struct ASH_EXPORT ShelfItem {
 
 typedef std::vector<ShelfItem> ShelfItems;
 
-// Windows with ShelfItemDetails appear in the shelf.
-// See ShelfWindowWatcher for details.
-struct ASH_EXPORT ShelfItemDetails {
-  ShelfItemDetails();
-  ~ShelfItemDetails();
-
-  ShelfItemType type = TYPE_UNDEFINED;
-
-  // Resource id of the image to display on the shelf.
-  int image_resource_id = kInvalidImageResourceID;
-
-  // Title of the item.
-  base::string16 title;
-};
-
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELF_SHELF_ITEM_TYPES_H_