[html-tests] Test that the error event can be canceled during loadstart (#685)

The first of these tests fails in Blink.

The spec probably doesn't require the tested beahvior, but it should:
https://www.w3.org/Bugs/Public/show_bug.cgi?id=24710

View on GitHub: https://github.com/w3c/web-platform-tests/pull/685

Received on Sunday, 23 February 2014 08:25:05 UTC