tree c7b8ac75db0e491f9d04636648e8163a808b0f6b
parent 116e72158533c45532748d45bfcf1948759d8dde
author Khushal Sagar <khushalsagar@chromium.org> 1708966421 -0800
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1708968649 -0800

view-transition: Fix rendering of elements with clip-path on descendants

The visual overflow rect computation code in ViewTransition assumes that
if an element has a clip-path, its content will be sized to the bounds
of that clip-path. The clip-path extent can be larger than the contents
of that element.

The above assumption is only true if the element with the clip-path is
layerized. Otherwise the size of the overflow is an intersection of the
element's painted content with the clip-path. This leads to incorrect
overflow calculation for an element's overflow rect when its not
layerized.

Fix the above by forcing layerization on descendants of a named element
if it has a clip-path. This is easier than knowing whether the content
will be layerized by the paint step later.

Fixed: 324585402
Change-Id: Id35cf3aab2cb4e9f0d27dbe36afeaf37789d95dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5322398
Auto-Submit: Khushal Sagar <khushalsagar@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Vladimir Levin <vmpstr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1265246}