style: Create a stacking context for contain:paint.

Bug: 1463599
Reviewed-by: mattwoodrow
MozReview-Commit-ID: Ln72MOlHXwi
This commit is contained in:
Yusuf Sermet 2018-05-28 23:54:01 -07:00 committed by Emilio Cobos Álvarez
parent 0c703fb97a
commit f0fbcf204e
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@ -593,7 +593,7 @@ ${helpers.predefined_type("contain",
"specified::Contain::empty()",
animation_value_type="discrete",
products="gecko",
flags="FIXPOS_CB",
flags="CREATES_STACKING_CONTEXT FIXPOS_CB",
gecko_pref="layout.css.contain.enabled",
spec="https://drafts.csswg.org/css-contain/#contain-property")}