http/tests/security/aboutBlank/security-context-alias.html

<html>
<body>
<iframe src="about:blank"></iframe><br>
<iframe src=""></iframe><br>
<pre>
<script>
if (window.testRunner)
  testRunner.dumpAsText();

document.write('--- Test begins ---\n');
document.write('* "about:blank"\n');
document.write('document.domain = ' + frames[0].document.domain + '\n');
document.write('* ""\n');
document.write('document.domain = ' + frames[1].document.domain + '\n');
document.write('--- After setting document.domain ---\n');
document.domain = '0.0.1';
document.write('* "about:blank"\n');
document.write('document.domain = ' + frames[0].document.domain + '\n');
document.write('* ""\n');
document.write('document.domain = ' + frames[1].document.domain + '\n');
document.write('--- Test ends ---\n');
</script>
</pre>
</body>
</html>