tree 1c346488290351da69d82ee77264d7c611be228e
parent 5e488929a9428290e0843f9abb63e775846a9c40
author Kent Tamura <tkent@chromium.org> 1658209324 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1658209805 -0700

Reland "Fieldset NG: Fix paint order of OOF objects in a LEGEND and the corresponding anonymous content box."

This is a reland of commit 538bf46dd9ac492c74cf720bbde3d7fe2d681fe4

The difference from the original CL:
Because the original CL caused a performance regression, this CL adds
a cache of the state of CanContainAbsolutePositionObjects().
LayoutObjectBitfields already has 96 bits, and this CL adds a bit flag
between full_paint_invalidation_reason_ and the bitfields. The size
of LayoutObject is not changed by this CL.

Original change's description:
> Fieldset NG: Fix paint order of OOF objects in a LEGEND and the
> corresponding anonymous content box.
>
> If a FIELDSET is an OOF container, we made its anonymous content box
> an OOF container by setting position:relative. It's bad because OOF
> objects in the LEGEND is painted behind the anonymous content box. So
> this CL updates OOF container conditions for anonymous fieldset content
> boxes, and avoids setting position:relative.
>
> * ng_fieldset_algorithm.cc:
> Handle NGBreakStatus::kDisableFragmentation.
> Without this change, floated-multicol-in-multicol-crash.html in WPT has
> a DCHECK failure.
>
> Bug: 1341413
> Change-Id: I650b3020df53eba5d05f930bc44675b80ff4e90b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3764404
> Reviewed-by: Koji Ishii <kojii@chromium.org>
> Commit-Queue: Kent Tamura <tkent@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1025081}

Bug: 1341413
Change-Id: I63cc9938a1a63f11bb7ea1c418839d3155313166
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3771160
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1025577}