chromium/content/test/data/accessibility/aria/aria-focusable-subwidget-not-goog-editable.html

<!--
@WIN-ALLOW:IA2_STATE_EDITABLE
-->
<!-- Subwidgets such as tree items should not have editable state
when an aria-activedescendant is pointing at them. -->
<div contenteditable aria-activedescendant="item1">
  <div role="tree">
    <div role="treeitem" id="item1">cats</div>
    <div role="treeitem" id="item2">dogs</div>
  </div>
</div>

<!-- "Control group" to prove that when no aria-activedescendant
is present, that the editable state is preserved -->
<div contenteditable>
  <div role="tree">
    <div role="treeitem" id="item3">fish</div>
    <div role="treeitem" id="item4">birds</div>
  </div>
</div>