<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
  <style>
    html {
      -webkit-overflow-scrolling: touch;
    }

    .overflow {
      width: 200px;
      height: 200px;
      margin: 10px;
      border: 1px solid black;
      display: inline-block;
    }
    
    .tall {
      height: 400px;
    }
    
    .short {
      height: 100px;
    }

    .scroll {
      overflow: scroll;
    }

    .auto {
      overflow: auto;
    }

    .contents {
      background-color: silver;
    }
  </style>
  <script>
    if (window.testRunner)
      testRunner.dumpAsText();

    function testScrollability(element)
    {
      // This will cause scrolled elements will have a 'bounds origin' of y=50 in their layer.
      element.scrollTop = 50;
    }
    
    function doTest()
    {
      var divs = document.querySelectorAll('body > div.overflow');
      for (var i = 0; i < divs.length; ++i)
        testScrollability(divs[i]);
      
      if (window.testRunner)
        document.getElementById('results').innerText = window.internals.layerTreeAsText(document);
    }
    window.addEventListener('load', doTest, false);
  </script>
</head>
<body>

  <div class="overflow scroll">
    <div class="short contents"></div>
  </div>

  <div class="overflow scroll">
    <div class="tall contents"></div>
  </div>
  <br>

  <div class="overflow auto">
    <div class="short contents"></div>
  </div>

  <div class="overflow auto">
    <div class="tall contents"></div>
  </div>
  
  <pre id="results">This test requires DRT.</pre>
</body>
</html>