<!DOCTYPE html>
<html>
<head>
  <style>
    h1 {
        -webkit-animation-name: spacing;
        -webkit-animation-duration: 1s;
    }
    @-webkit-keyframes spacing {
      0%  {
        word-spacing: normal
      }
      20%  {
        word-spacing: 100px
      }
      40%  {
        word-spacing: 200%
      }
      60%  {
        word-spacing: 20em
      }
      80%  {
        word-spacing: 300%
      }
      100% { }
    }
  </style>
</head>
<script>
if (window.testRunner)
  testRunner.dumpAsText();
</script>
<body>
<h1>PASS if no assert or crash in debug.</h1>
</body>
</html>