<!DOCTYPE html>
<html><head>
    <style>
        .container {
            margin: 20px;
            width: 300px;
            height: 200px;
            border: 1px solid black;
            overflow: scroll;
        }
        .horizontal-bt {
            -webkit-writing-mode: horizontal-bt;
        }
        .offset {
            width: 100px;
            height: 2000px;
        }
        .target {
            width: 100px;
            height: 100px;
            background-color: red;
            visibility: hidden;
        }
    </style>
</head>
<body>
    <!-- A rect (target class) should be painted. -->
    <!-- In DumpRenderTree, there should be repaint logs of 100x100 rect. We don't care how many times is the log dumpped. -->
    <div class="container">
    <div class="horizontal-bt">
        <div class="target"></div>
        <div class="offset"></div>
    </div></div>
    <script src="resources/text-based-repaint.js" type="text/javascript"></script>
    <script>
        repaintTest = function() {
            var target = document.getElementsByClassName("target")[0];
            target.style.visibility = "visible";
        };
        var container = document.getElementsByClassName("container")[0];
        container.scrollTop = 3000;
        runRepaintTest();
    </script>
</body></html>