emberjs/ember.js — pull request #5258 by rwjblue (2014-07-28 14:32:40+00:00)
Title: [BUGFIX beta] Use document.body.contains if Node is undefined.

Fixes the changes made in https://github.com/emberjs/ember.js/pull/5240 to work with IE8.

Closes https://github.com/emberjs/ember.js/issues/5250.
Closes https://github.com/emberjs/ember.js/pull/5256.