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chromium/third_party/blink/web_tests/svg/markers/marker-orientation-close-path.html 

<!DOCTYPE html>
<svg width="100">
  <marker id="m" overflow="visible" orient="auto" refX="50" refY="50">
    <rect width="100" height="100" fill="green"/>
  </marker>
  <path d="M0,0h100L50,50z" marker-mid="url(#m)" fill="red"/>
</svg>