svg-resource-fragment-identifier-background-srcset.html

<!DOCTYPE html>
<script>
  window.targetScaleFactor = 2;
</script>
<script src="../../fast/hidpi/resources/srcset-helper.js"></script>
<style>
  div {
    width:  100px;
    height: 100px;
  }
</style>

<!-- standard -->
<div style="background: image-set(url(resources/fragment-identifiers.svg#red) 1x,
                                  url(resources/fragment-identifiers.svg#green) 2x);">
</div>

<br>

<!-- prefixed -->
<div style="background: -webkit-image-set(url(resources/fragment-identifiers.svg#red) 1x,
                                          url(resources/fragment-identifiers.svg#green) 2x);">
</div>

chromium/third_party/blink/web_tests/svg/css/svg-resource-fragment-identifier-background-srcset.html