visual_state_waits_for_js_detached_test.html

<html>
<head>
  <script>
    function updateColor() {
      document.body.style.backgroundColor = "red";
      pageChangeNotifier.onPageChanged();
    }
  </script>
  <style>
    body {
      margin: 0px;
      padding: 0px;
      background-color: blue;
    }
  </style>
</head>
<body onload="javascript:updateColor()">
</body>
</html>

chromium/android_webview/test/shell/assets/visual_state_waits_for_js_detached_test.html