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chromium/third_party/blink/web_tests/compositing/foreign-object-not-composited.html 

<!DOCTYPE html>
<div style='overflow: auto; backface-visibility: hidden; width: 100%; height: 100%'>
  <svg width='100' height='100'>
    <foreignObject  width='100' height='100'>Should not be visible.</foreignObject>
    <rect x='0' y='0' width='100' height='80' fill='green'/>
  </svg>
</div>