<!DOCTYPE html>
<!-- there should be four green squares and no visible red -->
<style>
.container {
width: 100px;
height:100px;
background-color: green;
position:absolute;
-webkit-transform:translateZ(0);
overflow:auto;
}

::-webkit-scrollbar {
background-color: red;
}

::-webkit-resizer {
background-color: red;
}

.content {
-webkit-transform: translateZ(0);
position:absolute;
width:10px;
height:10px;
}

.tall {
height:200px;
}

.wide {
width:200px;
}

.resizeWidget {
resize: both;
}

</style>
<div class="container">
  <div id="vertical" class="content tall"></div>
</div>
<div class="container" style="left: 150px">
  <div id="horizontal" class="content wide"></div>
</div>
<div class="container" style="left: 300px">
  <div id="both" class="content tall wide"></div>
</div>
<div id="corner" class="container resizeWidget" style="left: 450px">
  <div class="content"></div>
</div>
<script>
function finishTest() {
    document.getElementById("vertical").classList.remove("tall"); // topmost div loses a vertical scrollbar
    document.getElementById("horizontal").classList.remove("wide"); // second div loses a horizontal scrollbar
    document.getElementById("both").classList.remove("wide"); // third div loses both
    document.getElementById("both").classList.remove("tall"); // vertical and horizontal scrollbars
    document.getElementById("corner").classList.remove("resizeWidget"); // bottom div loses a resize corner but no scrollbars
}

if (window.testRunner) {
    testRunner.dumpAsText(true);
    testRunner.displayAndTrackRepaints(); // Paint once with all overflow controls visible.
    finishTest();
} else
    window.setTimeout(finishTest, 0);
</script>