fix 'location is not defined' error

[jakemmarsh]

I receive the error ReferenceError: location is not defined when running Mocha tests via Gulp. I'm using jsdom to mock the document and window, which is resulting in the global location being undefined unless I explicitly do global.location = '{}; (or utilize this fix).

[dasilvacontin]

When does this fail? Doesn't it by default get window.location?

[jakemmarsh]

@dasilvacontin edited to explain when I get the error!

[boneskull]

@jakemmarsh This looks fine to me; please rebase though.

[dasilvacontin]

I hope it doesn't break with people that decided to go with the "explicitly do global.location = '{}';" route.

[dasilvacontin]

Maybe (window.location || location) just to be sure. Until next major.

[jakemmarsh]

Closing in favor of #1654