chromium/third_party/blink/web_tests/external/wpt/css/CSS2/backgrounds/support/red-intrinsic-ratio-portrait.svg

<!-- only intrinsic ratio (portrait) -->
<svg xmlns="http://www.w3.org/2000/svg"
     viewBox="0 0 4 6">
  <rect width="100%" height="100%" fill="red"/>
</svg>