Stylo doesn't use -x-system-font for system font, so this bug is irrelevant. It makes no sense to fix this failure in stylo, so we should simply disable it for stylo. We probably want a helper function in SimpleTest.js to check whether we are in stylo, I guess.

The other test I change is a behavior change from stylo tracked in bug 1374885.

Comment on attachment 8879814 [details] Bug 1367306 part 1 - Add an attribute in nsIDOMWindowUtils to check whether the document is styled by stylo. https://reviewboard.mozilla.org/r/151210/#review156384

Comment on attachment 8879815 [details] Bug 1367306 part 2 - Adjust some test expectation based on whether stylo is being used. https://reviewboard.mozilla.org/r/151212/#review156386

Pushed by xquan@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/7397673ce43d part 1 - Add an attribute in nsIDOMWindowUtils to check whether the document is styled by stylo. r=bholley https://hg.mozilla.org/integration/autoland/rev/8661f5f327f9 part 2 - Adjust some test expectation based on whether stylo is being used. r=bholley

https://hg.mozilla.org/mozilla-central/rev/7397673ce43d https://hg.mozilla.org/mozilla-central/rev/8661f5f327f9