[shadow-dom-tests] event.path should include Window object as per W3C bug 21066 (#1524)

[Comment 35 of bug 21066](https://www.w3.org/Bugs/Public/show_bug.cgi?id=21066#c35) pointed out that `event.path` should include `Window` when it's in the path.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1524

Received on Tuesday, 13 January 2015 08:48:09 UTC