[WebIDL-tests] Update current-realm.html test (#4378)

Update current-realm.html test to ignore errors when loading the FontFace from about:blank since it's not a valid URL and the result of the load is not important for the test.

This helps fix https://bugs.chromium.org/p/chromium/issues/detail?id=402694 as chromium has tests that check for diffs in the console log and they trigger on this error message.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4378

Received on Wednesday, 21 December 2016 13:50:27 UTC