<!DOCTYPE html>
<html>
<head>
<style>
::-webkit-scrollbar {
    width: 16px;
    height: 16px;
    -webkit-appearance: searchfield-results-decoration;
}

::-webkit-scrollbar-track {
    background-color: #E3E3E3;
    -webkit-appearance: searchfield-cancel-button;
}

::-webkit-scrollbar-thumb {
    background: black;
}

.scroll-container {
    overflow: scroll;
    width: 50px;
    height: 50px;
}

.overflowing {
    width: 200px;
    height: 200px;
}
</style>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
</head>
<body>
PASS, WebKit didn't crash.
<div class="scroll-container"><div class="overflowing"></div></div>
</body>
</html>