third_party/blink/web_tests/external/wpt/battery-status/support-window-open.html - chromium/src - Git at Google

 <!DOCTYPE HTML>
 <meta charset="utf-8">
 <script>
 var data = [
     navigator === window.opener.navigator,
     navigator.getBattery() === window.opener.navigator.getBattery(),
     navigator.getBattery() === navigator.getBattery()
 ];
 window.opener.postMessage(data, '*');
 </script>
	<!DOCTYPE HTML>
	<meta charset="utf-8">
	<script>
	var data = [
	navigator === window.opener.navigator,
	navigator.getBattery() === window.opener.navigator.getBattery(),
	navigator.getBattery() === navigator.getBattery()
	];
	window.opener.postMessage(data, '*');
	</script>