tree 9eb8d65c2951c2b5b3fd67fabe670d2b5ecf9f31
parent 7e9bfd839d6b19555d947447ae996f11ac86facc
author Rune Lillesveen <futhark@chromium.org> 1564066010 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1564067548 -0400

Handle display:contents for viewport propagation.

When documentElement/body does not generate a box, its background will
not propagate to the viewport (see [1]). This removes the need
for calling EnsureComputedStyle() on documentElement/body.

The CSSWG has also resolved that to be the case also for other
properties propagated to the viewport[2].

Some of the wpt tests for body propagation didn't actually have a body
element. Added.

[1] https://drafts.csswg.org/css-backgrounds/#special-backgrounds
[2] https://github.com/w3c/csswg-drafts/issues/3779#issuecomment-481762912

Bug: 987207

Change-Id: I06e618e2acd2926b5ae4831bf5825e13e970d035
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1547974
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680834}