<!DOCTYPE html>
<html>
  <head>
    <title>Test that switching to tiled layers when the parent is a tiled layer does not crash</title>

    <style type="text/css" media="screen">

    #container {
      width: 500px;
      height: 5000px;
      border: 1px solid black;
      background-color: yellow;
      -webkit-transform:translateZ(0);
    }
    
    #box {
        position: absolute;
        left:50px;
        width: 200px;
        height: 200px;
        -webkit-transform:translateZ(0);
        top: 100px;
        background-color: red;
    }
    </style>
    <script type="text/javascript" charset="utf-8">
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
        }
        
        result = "";

        function testOnLoad()
        {
            window.setTimeout(function() {
                document.getElementById('box').style.height = "4800px";
                
                // Let it render
                window.setTimeout(function() {
                    if (window.testRunner) {
                        document.getElementById('layers').innerHTML = window.internals.layerTreeAsText(document);
                        testRunner.notifyDone();
                    }
                }, 0);
            }, 0);
        }
      
        window.addEventListener('load', testOnLoad, false);
    </script>
  </head>
  <body>
      <p>
        From https://bugs.webkit.org/show_bug.cgi?id=44629. The parent is a tiled layer.
        When the child is a non-tiled layer and it is switched to a tiled layer, a crash
        occurs. This test should not crash.
      </p>
        <div id="container">
          <div id="box"></div>
        </div>
        <pre id="layers">Layer tree appears here in DRT.</pre>
  </body>
</html>