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} -- wpt-commits: 9456ecd8ee24fde91ae592673deeaed7cc5255b5 wpt-pr: 33992
2022-05-16 10:07:58 +00:00 · 2022-05-16 10:07:58 +00:00 · b1ad06b598
--- a/testing/web-platform/tests/css/css-contain/container-queries/inner-first-line-non-matching-ref.html
+++ b/testing/web-platform/tests/css/css-contain/container-queries/inner-first-line-non-matching-ref.html
@ -0,0 +1,3 @@
+<!doctype html>
+<title>CSS Test Reference</title>
+<div style="color:green">This text should be green.</div>
--- a/testing/web-platform/tests/css/css-contain/container-queries/inner-first-line-non-matching.html
+++ b/testing/web-platform/tests/css/css-contain/container-queries/inner-first-line-non-matching.html
@ -0,0 +1,13 @@
+<!doctype html>
+<title>CSS Container Queries Test: Non-matching ::first-line in @container</title>
+<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-queries">
+<link rel="match" href="inner-first-line-non-matching-ref.html">
+<style>
+  #outer::first-line { color: green }
+  @container (width > 99999px) {
+    #inner::first-line { color: red }
+  }
+</style>
+<div id="outer">
+  <div id="inner">This text should be green.</div>
+</div>