LayoutTests/fast/repaint/region-painting-invalidation.html

<html>
<head>
<title>Test for https://bugs.webkit.org/show_bug.cgi?id=78787</title>
<script>
    if (window.testRunner)
        window.testRunner.overridePreference("WebKitCSSRegionsEnabled", "1");
</script>
<style type="text/css">
#content {
    -webkit-flow-into: flow1;
}

#target { height: 100px; background-color: red }

#region1, #region2 {
    -webkit-flow-from: flow1;
}

#region1 {
    width: 300px;
    height: 150px;
    border:1px solid black;
    background-color:red;
}

#region2 {
    width: 300px;
    height: 200px;
    border:1px solid black;
    background-color:red;
}

</style>
<script src="resources/repaint.js" type="text/javascript"></script>
<script>
function repaintTest()
{
    document.getElementById('target').style.height = '350px';
    document.getElementById('target').style.backgroundColor = 'green';
}
</script>
</head>
<body onload="runRepaintTest();">
    <div id="content">
        <div id="target"></div>
    </div>

    <div id="region1"></div><br/>
    <div id="region2"></div>
</body>
</html>