LayoutTests/fast/forms/meter-appearance-on-pseudo-element.html - external/github.com/WebKit/webkit - Git at Google

 <style>
     dialog::backdrop {
         appearance: meter;
     }
  </style>
 <body>
     <dialog id="dialog"></dialog>
     <p>This test passes if it does not crash.</p>
     <script>
         dialog.showModal();
         if (window.testRunner)
             testRunner.dumpAsText();
     </script>
 </body>
	<style>
	dialog::backdrop {
	appearance: meter;
	}
	</style>
	<body>
	<dialog id="dialog"></dialog>
	<p>This test passes if it does not crash.</p>
	<script>
	dialog.showModal();
	if (window.testRunner)
	testRunner.dumpAsText();
	</script>
	</body>