Bug 1480047 [wpt PR 12252] - Add WPT for :scope selector on shadow tr…

…ees, a=testonly

Automatic update from web-platform-testsAdd WPT for :scope selector on shadow trees

This WPT shows that :scope does not work for shadow root.
:scope matches nothing when the direct child element or descendant of shadow root should be selected, while :scope works fine for descendant elements within shadow root.

Link to the spec:
https://drafts.csswg.org/selectors-4/#the-scope-pseudo

Link to related issue:
w3c/csswg-drafts#3016

Bug: 859692
Change-Id: I801706eb7891035dcb900588d5542bd48fa1c12a
Reviewed-on: https://chromium-review.googlesource.com/1158445
Commit-Queue: Momoko Sumida <momongoogle.com>
Reviewed-by: Rakina Zata Amni <rakinachromium.org>
Reviewed-by: Hayato Ito <hayatochromium.org>
Cr-Commit-Position: refs/heads/master{#583210}

--

wpt-commits: a48491848fb4e328e6cdd5c4d7a95494f1ff2c6a
wpt-pr: 12252

UltraBlame original commit: 337b6f0c1dc4f4c6a3817b0b1fa478c8ade30566

testing/web-platform/meta/MANIFEST.json

@@ -2053299,6 +2053299,36 @@ css
 /
 selectors
 /
+scope
+-
+selector
+.
+html
+"
+:
+[
+[
+"
+/
+css
+/
+selectors
+/
+scope
+-
+selector
+.
+html
+"
+{
+}
+]
+]
+"
+css
+/
+selectors
+/
 user
 -
 invalid
@@ -3738630,6 +3738660,26 @@ selectors
 /
 scope
 -
+selector
+.
+html
+"
+:
+[
+"
+bda0aed602aa691bba4c4089f0a4827a9b836c9e
+"
+"
+testharness
+"
+]
+"
+css
+/
+selectors
+/
+scope
+-
 without
 -
 scoping