[Gecko Bug 1559276] Part 2: Retire the support for 3-valued syntax for position. #17777
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According to this resolved spec issue:
w3c/csswg-drafts#2140,
we retire the 3-valued on
object-position
perspective-origin
,mask-position
circle()
andellipse()
, but still keep the support for
background-position
.Besides, I simply run this python script to generate the .ini file:
Differential Revision: https://phabricator.services.mozilla.com/D37126
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1559276
gecko-commit: 6ec2809da4e31720cbb59b4ba71616c1c168553e
gecko-integration-branch: autoland
gecko-reviewers: emilio