1 Accessing window.frameElement from inside an iframe should not cause the <iframe>'s prototype to come from its own context.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS iframe instanceof HTMLIFrameElement is true
7 PASS iframe instanceof iframe.contentWindow.HTMLIFrameElement is false
8 PASS successfullyParsed is true