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chromium/third_party/blink/web_tests/css3/viewport-percentage-lengths/css3-viewport-percentage-lengths-vw-absolute-expected.html 

<!DOCTYPE>
<html>
<style>
 #element-container-absolute-vw {
   background:green;
   position:absolute;
 }
</style>
<div id="element-container-absolute-vw">TEST PASSED</div>
<script>
function applyStyle() {
    var viewportWidth = window.innerWidth;
    var elementStyle = document.getElementById("element-container-absolute-vw").style;
    elementStyle.top = Math.floor(10 * viewportWidth / 100) + "px";
    elementStyle.bottom = Math.floor(10 * viewportWidth / 100) + "px";
    elementStyle.left = Math.floor(10 * viewportWidth / 100) + "px";
    elementStyle.right = Math.floor(10 * viewportWidth / 100) + "px";
}
applyStyle();
</script>
</html>