Chromium side Implementation to expose aria properties - setsize & posinset

ui/accessibility/ax_enums.idl

 // Copyright 2014 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.
 
 // These should be kept in sync with third_party/WebKit/public/web/WebAXEnums.h
 // until the Chromium and Blink trees are merged.
 [camel_case_enum_to_string=true] namespace ui {
 
   // For new entries to the following three enums, also add to
   // chrome/common/extensions/api/automation.idl.
@@ skipping 295 matching lines @@
 
     // Inline text attributes.
     text_direction,
 
     // Uniquely identifies an AXTree.
     tree_id,
 
     // Identifies a child tree which this node hosts.
     child_tree_id,
 
+    // Position or Number of items in current set of listitems or treeitems
+    set_size,
+    pos_in_set,
+
     // Indicates if a form control has invalid input or
     // if an element has an aria-invalid attribute.
     invalid_state
   };
 
   [cpp_enum_prefix_override="ax_attr"] enum AXFloatAttribute {
     // Document attributes.
     doc_loading_progress,
 
     // Range attributes.
@@ skipping 94 matching lines @@
   };
 
   [cpp_enum_prefix_override="ax"] enum AXSortDirection {
     sort_direction_unsorted,
     sort_direction_ascending,
     sort_direction_descending,
     sort_direction_other
   };
 
 };