[html-tests] Add a convenience function in nsGlobalWindow for replacing a property on the window with a new value. (#1745)

Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1151940

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1745

Received on Thursday, 9 April 2015 17:27:57 UTC