device-scale-factor-paint.html | Explore in Territory

<!DOCTYPE html>
<div style='position: absolute; left: 5px; top: 10px; width: 50px; height: 50px; background-color: green'>
</div>
<script>
    function finishTest() {
        setTimeout(function() { testRunner.notifyDone() }, 0);
    }
    if (window.testRunner) {
        testRunner.waitUntilDone();
        testRunner.setBackingScaleFactor(2, finishTest);
    }
</script>

chromium/third_party/blink/web_tests/fast/hidpi/device-scale-factor-paint.html