LayoutTests/fullscreen/full-screen-layer-dump.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <style>
 body {
     font-family: ahem;
     -webkit-font-smoothing: none;
 }
 </style>
 <script>
     window.addEventListener('load', event => {
         let out = document.querySelector('#out');
         let target = document.querySelector('#target');

         if (!window.internals || !window.testRunner || !window.eventSender) {
             out.innerText = 'This test requires internals';
             return;
         }

         testRunner.dumpAsText(false);
         testRunner.waitUntilDone();

         document.addEventListener('webkitfullscreenchange', event => {
             if (document.webkitIsFullScreen) {
                 setTimeout(() => {
                     out.innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_CONTENT_LAYERS);
                     document.webkitCancelFullScreen();
                 }, 0)
             } else
                 testRunner.notifyDone();
         });


         document.addEventListener('keydown', event => {
             target.webkitRequestFullScreen();
         });
         if (window.eventSender)
             eventSender.keyDown('a');
     });
 </script>
 </head>
 <body>
     <div id=target></div>
     <pre id=out></pre>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<style>
	body {
	font-family: ahem;
	-webkit-font-smoothing: none;
	}
	</style>
	<script>
	window.addEventListener('load', event => {
	let out = document.querySelector('#out');
	let target = document.querySelector('#target');

	if (!window.internals \|\| !window.testRunner \|\| !window.eventSender) {
	out.innerText = 'This test requires internals';
	return;
	}

	testRunner.dumpAsText(false);
	testRunner.waitUntilDone();

	document.addEventListener('webkitfullscreenchange', event => {
	if (document.webkitIsFullScreen) {
	setTimeout(() => {
	out.innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_CONTENT_LAYERS);
	document.webkitCancelFullScreen();
	}, 0)
	} else
	testRunner.notifyDone();
	});


	document.addEventListener('keydown', event => {
	target.webkitRequestFullScreen();
	});
	if (window.eventSender)
	eventSender.keyDown('a');
	});
	</script>
	</head>
	<body>
	<div id=target></div>
	<pre id=out></pre>
	</body>
	</html>