Fix top-layer position:sticky.
We incorrectly only checked for position:relative and position:static
when performing the out-of-flow position adjusted specified:
https://drafts.csswg.org/css-position-4/#top-styling
Explicitly check if we don't have out-of-flow position instead.
Change-Id: I3be27b3d54f96f1c35796f50cec9715a08a86049
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5797251
Commit-Queue: Ian Kilpatrick ikilpatrick@chromium.org
Auto-Submit: Ian Kilpatrick ikilpatrick@chromium.org
Reviewed-by: Mason Freed masonf@chromium.org
Cr-Commit-Position: refs/heads/main@{#1343850}