third_party/blink/web_tests/css3/filters/effect-reference-subregion-hidpi.html

<script>
    if (window.testRunner) {
        testRunner.waitUntilDone();
        testRunner.setBackingScaleFactor(2, function() { testRunner.notifyDone(); });
    }
</script>
<svg xmlns="http://www.w3.org/2000/svg" width="0" height="0" version="1.1">
  <defs>
    <filter id="colormatrix" color-interpolation-filters="sRGB">
      <feColorMatrix x="10" y="20" width="80" height="60"/>
    </filter>
  </defs>
</svg>
<style>
.filtered {
    filter: url(#colormatrix);
    background-color: green;
    width: 100px;
    height: 100px;
}
body {
    margin: 0px;
}
</style>
<div class="filtered">
</div>