Add conversion rule for aria-grabbed attributes.

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 327 matching lines @@
     // If this is set, all of the other fields in this struct should
     // be ignored and only the locations should change.
     update_location_only,
 
     // Set on a canvas element if it has fallback content.
     canvas_has_fallback,
 
     // Set if this node is the host of an external AXTree, for
     // example a web view that's a child of a native view, or a
     // web iframe that's the child of another web frame.
-    is_ax_tree_host
+    is_ax_tree_host,
+
+    // grabbed attributes

[dmazzoni, 2015/01/27 06:59:41]

Make it a short sentence, like:

Set if this node has been selected for dragging in a drag-n-drop operation.

[je_julie(Not used), 2015/01/27 16:00:29]

Done.

+    grabbed
   };
 
   [cpp_enum_prefix_override="ax_attr"] enum AXIntListAttribute {
     // Ids of nodes that are children of this node logically, but are
     // not children of this node in the tree structure. As an example,
     // a table cell is a child of a row, and an 'indirect' child of a
     // column.
     indirect_child_ids,
 
     // Relationships between this element and other elements.
@@ skipping 38 matching lines @@
 
   [cpp_enum_prefix_override="ax"] enum AXInvalidState {
     invalid_state_false,
     invalid_state_true,
     invalid_state_spelling,
     invalid_state_grammar,
     invalid_state_other
   };
 
 };