[XMLHttpRequest-tests] Update tests to ensure they do not timeout (#1057)

Changes that remain relevant from old pull request https://github.com/w3c/web-platform-tests/pull/555, https://critic.hoppipolla.co.uk/r/623).


View on GitHub: https://github.com/w3c/web-platform-tests/pull/1057

Received on Thursday, 12 June 2014 10:51:48 UTC