style: Add Gecko-only support for writing-mode:sideways-{lr,rl}.

Fixes #15213.
This commit is contained in:
Cameron McCormack 2017-04-15 20:10:24 +10:00
parent 10f2d3c38e
commit b73916a135
3 changed files with 36 additions and 11 deletions

View file

@ -18,6 +18,7 @@ ${helpers.single_keyword("visibility",
// https://drafts.csswg.org/css-writing-modes-3
${helpers.single_keyword("writing-mode",
"horizontal-tb vertical-rl vertical-lr",
extra_gecko_values="sideways-rl sideways-lr",
experimental=True,
need_clone=True,
animation_type="none",