Sync web-platform-tests PR 28528 into mozilla-central (this bug is closed when the sync is complete).
Revert "Expand synthesized clip layer by 1 pixel"
This reverts commit 8643a99de2538ac309252247a5fe90756d9014e9.
Reason for revert: Caused crbug.com/1199366. The underlying issue is
still unclear yet. Revert first, and we'll continue to investigate
which will be tracked by crbug.com/1171601.
Original change's description:
Expand synthesized clip layer by 1 pixel
Though the clip mask layer and the masked layer are perfectly aligned in
blink and cc, the geometry of the quads may go through different mapping
code paths, depending on the types of the quads, causing slight
misalignment of the mask quad and masked quad and hairline align the
edges. Expand the mask layer by 1 pixel to ensure its coverage on the
masked layer in case of floating-point errors etc.
Commit-Queue: Xianzhu Wang \<firstname.lastname@example.org>
Reviewed-by: Philip Rogers \<email@example.com>