[html-tests] Update window-properties.html to current WebIDL. (#394)

In particular, WebIDL now defines that members of the global object end up on the object itself; see http://dev.w3.org/2006/webapi/WebIDL/#es-attributes (second bullet, second and third sub-bullets).

View on GitHub: https://github.com/w3c/web-platform-tests/pull/394

Received on Tuesday, 29 October 2013 16:02:25 UTC