chromium/third_party/blink/web_tests/svg/hixie/intrinsic/resources/003.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="10 10 1 2">
 <!-- width="100%" height="100%" is implied, so intrinsic size is 100%x100% -->
 <!-- intrinsic ratio is 2:1 due to viewBox -->
</svg>