third_party/blink/web_tests/fast/frames/iframe-set-inner-html.html - chromium/src - Git at Google

 <html>
 <script>
 function runTest() {
     if (window.testRunner) {
         testRunner.dumpAsText();
         testRunner.dumpChildFrames();
     }

     var c = document.getElementById('container');

     c.innerHTML = "<span><iframe></iframe><iframe></iframe></span>"
 }
 </script>
 <body onload="runTest()">
 <div id="container"></div>
 <div>This tests that inserting two &lt;iframe&gt; elements using innerHTML actually causes two frames with unique names to be created.</div>
 </body>
 </html>
	<html>
	<script>
	function runTest() {
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.dumpChildFrames();
	}

	var c = document.getElementById('container');

	c.innerHTML = "<span><iframe></iframe><iframe></iframe></span>"
	}
	</script>
	<body onload="runTest()">
	<div id="container"></div>
	<div>This tests that inserting two <iframe> elements using innerHTML actually causes two frames with unique names to be created.</div>
	</body>
	</html>