CanadaHonk e115104963 Bug 1846853 - Clamp negative outline-offset per spec r=emilio
A negative outline-offset value should be clamped per spec as to stop it
from becoming invisible with large negative values.

Spec ref: https://www.w3.org/TR/css-ui-4/#outline-offset

Also added a new WPT reftest for this case as no tests existed prior,
updated related WPT expectations, and updated a few old layout reftests.

Differential Revision: https://phabricator.services.mozilla.com/D185357
2023-08-23 11:35:01 +00:00
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