Bug 1768442 [wpt PR 33992] - [@container] Walk ancestry if ::first-line style is...

Bug 1768442 [wpt PR 33992] - [@container] Walk ancestry if ::first-line style is null, a=testonly

Automatic update from web-platform-tests
[@container] Walk ancestry if ::first-line style is null

HasPseudoElementStyle may return true even if the element does not
currently apply any ::first-line rules because we
SetHasPseudoElementStyle when only container queries fail.

If we get a null ComputedStyle for an element which returns true for
HasPseudoElementStyle(kPseudoIdFirstLine), continue to walk ancestors to
look for the ::first-line style.

Bug: 1273913
Change-Id: I87b7f9c04f818f2d9c82c6eb417b81465f15d913
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3629362
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1001435}

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wpt-commits: 9456ecd8ee24fde91ae592673deeaed7cc5255b5
wpt-pr: 33992