chromium/src/third_party/blink/web_tests/http/tests/security/isolatedWorld/string-prototype.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 <div id="console"></div>
 <script>
 String.prototype.foo = "FAIL: Visible in isolated world.";
 if (window.testRunner) {
   testRunner.dumpAsText();
   testRunner.evaluateScriptInIsolatedWorld(
     1,
     "document.getElementById('console').innerHTML = ''.foo");
 }
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	<div id="console"></div>
	<script>
	String.prototype.foo = "FAIL: Visible in isolated world.";
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.evaluateScriptInIsolatedWorld(
	1,
	"document.getElementById('console').innerHTML = ''.foo");
	}
	</script>
	</body>
	</html>