tree 39b48137496a1a00383b92bd8af3bb11d50ede55
parent 005c381c81c4662ea3cbdd9d2d9cad59f671ec36
author Morten Stenshorne <mstensho@chromium.org> 1528361878 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1528375619 -0400

Correctly detect when a multicol descendant becomes or ceases to be a containing block.

When a descendant of a multicol container becomes a containing block for
out-of-flow positioned objects, or ceases to be one, out-of-flow
positioned children may become or cease to be a part of the
fragmentation context.

We didn't detect this correctly. We only checked for transforms (in
addition to position:relative). Make sure we check for filters too, now
that those also establish containing blocks.

Bug: 847328
Change-Id: I7ab47860bb8d9f8d9b0256b25e1123c34f73e8f4
Reviewed-on: https://chromium-review.googlesource.com/1089336
Reviewed-by: Emil A Eklund <eae@chromium.org>
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565210}