tree fc72e44fc16f6bac908731d21efbbe6773454ce9
parent 7f9db5e2eb8852d317613a1e4017b045ee4096e4
author L. David Baron <dbaron@dbaron.org> 1537118763 -0700
committer GitHub <noreply@github.com> 1537118763 -0700
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Sync Mozilla CSS tests as of https://hg.mozilla.org/mozilla-central/rev/7ed950e60f3c1f8a47c117c04124d31e94a66e32 . (#13022)

This contains a single change, from [bug 1490730](https://bugzilla.mozilla.org/show_bug.cgi?id=1490730) by @MatsPalmgren.