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chromium/content/test/data/accessibility/aria/aria-grid.html 

<!--
@BLINK-ALLOW:table*
@MAC-ALLOW:AXRoleDescription
@WIN-ALLOW:*SELECTABLE
@WIN-ALLOW:xml-roles*
@WIN-ALLOW:colindex:*
@WIN-ALLOW:rowindex:*
@WIN-ALLOW:ia2_table_cell_column_index=*
@WIN-ALLOW:ia2_table_cell_row_index=*
@AURALINUX-ALLOW:xml-roles*
@AURALINUX-ALLOW:col*
@AURALINUX-ALLOW:row*
@AURALINUX-ALLOW:select*
-->
<!DOCTYPE html>
<html>
<body>
<div role="grid">
  <div role="row">
    <span role="columnheader">Browser</span>
    <span role="columnheader">Rendering Engine</span>
  </div>
  <div role="row">
    <span role="gridcell">Chrome</span>
    <span role="gridcell">Blink</span>
  </div>
</div>
</body>
</html>