<!DOCTYPE>
<body onload="startTest()">
<style>
#testField {
    width: 100px;
    height: 30px;
    -webkit-appearance: none;
}
</style>
<input type="search" id="testField" value="Shaking!">

<script>
function startTest() {
    document.getElementById('testField').offsetTop;
    document.getElementById('testField').style.width = '200px';
    if (window.testRunner)
        testRunner.notifyDone();
}

if (window.testRunner)
    testRunner.waitUntilDone();
</script>
</body>