chromium/third_party/blink/web_tests/svg/as-image/resources/green-relative-size-rect.svg

<svg xmlns="http://www.w3.org/2000/svg" width='100%' height='100%'>
    <rect fill='green' width='100%' height='100%' />
    <circle cx="50%" cy="50%" r="10%" fill="navy"/>
</svg>