<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <meta name="viewport" content="width=device-width">
    <style>
        body {
            margin: 0;
        }
        
        #scroller {
            margin: 10px;
            height: 300px;
            width: 300px;
            overflow: scroll;
        }
        
        .box {
            width: 100%;
            height: 100%;
        }
        
        .top {
            background-color: red;
        }

        .bottom {
            background-color: green;
        }

        .scrollbar-hider {
            position: absolute;
            width: 16px;
            height: 300px;
            top: 10px;
            left: calc(310px - 16px);
            background-color: gray;
        }
    </style>
    <script>
        function doTest()
        {
            scroller.scrollTop = 500;
        }
        
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div id="scroller">
        <div class="top box"></div>
        <div class="bottom box"></div>
    </div>
    <div class="scrollbar-hider"></div>
</body>
</html>