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

<script>
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        testRunner.waitUntilDone();
        testRunner.setBackingScaleFactor(2, function() { testRunner.notifyDone(); });
    }
</script>
<style>
.box {
    background-color: green;
    width: 80px;
    height: 60px;
    left: 10px;
    top: 20px;
    position: absolute;
}
body {
    margin: 0px;
}
</style>
<div class="box">
</div>