Aria-details takes an ID reference, not an ID reference list

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.
 
 // TODO(nektar): Migrate entire file to Mojoq.
 // 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 four enums, also add to
@@ skipping 386 matching lines @@
     // What information was used to compute the object's name
     // (of type AXNameFrom).
     name_from,
 
     // What information was used to compute the object's description
     // (of type AXDescriptionFrom).
     description_from,
 
     // Relationships between this element and other elements.
     activedescendant_id,
+    details_id,
     errormessage_id,
     in_page_link_target_id,
     member_of_id,
     next_on_line_id,
     previous_on_line_id,
 
     // Identifies a child tree which this node hosts.
     child_tree_id,
 
     // Position or Number of items in current set of listitems or treeitems
@@ skipping 62 matching lines @@
   [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.
     controls_ids,
     describedby_ids,
-    details_ids,
     flowto_ids,
     labelledby_ids,
     radio_group_ids,
 
     // For static text. Character indices where line breaks occur. Note that
     // this attribute is only available on Chrome OS and will be deprecated
     // soon.
     line_breaks,
 
     // For static text. These int lists must be the same size; they represent
@@ skipping 172 matching lines @@
     // First node is before the second one.
     before,
 
     // Nodes are the same.
     equal,
 
     // First node is after the second one.
     after
   };
 };