chromium/src/third_party/blink/web_tests/fast/forms/tab-in-input.html

<script>
	if (window.testRunner)
	    testRunner.dumpAsText();
</script>
You should see "\tHello World" in the text field below<br />
<input id="inputElem" type="text" value="	Hello World">
<pre id="console"></pre>
<script>
	if (window.testRunner) {
		var inputElem = document.getElementById("inputElem");
		document.getElementById("console").appendChild(document.createTextNode(inputElem.value));
	}
</script>