Bug 1835021 [wpt PR 40218] - [scroll-animations] Avoid scroll/view-ti…

…meline-attachment in WPTs, a=testonly

Automatic update from web-platform-tests
[scroll-animations] Avoid scroll/view-timeline-attachment in WPTs

These properties will be removed from the spec [1]. The new property
timeline-scope offers similar functionality.

This CL is mostly a self-explanatory migration from
*-timeline-attachment to timeline-scope, with a few exceptions:

 - The test id=timeline_ancestor_scroll_timeline_wins_on_same_element
   needed more severe adjustment, because deferred timelines are
   no longer typed (that is, a deferred timeline is not a
   scroll timeline nor a view timeline), so that test had
   to be refactored to avoid using deferred timelines.
 - A few tests in view-timeline-dynamic.html were refactored to avoid
   timeline-scope, as timeline-scope was not essential for those tests.

[1] w3c/csswg-drafts#7759

Bug: 1446702
Change-Id: I205069b065a97928f755993f3c5f301693cc72ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4565315
Reviewed-by: Mustaq Ahmed <mustaqchromium.org>
Commit-Queue: Anders Hartvoll Ruud <andruudchromium.org>
Cr-Commit-Position: refs/heads/main{#1149088}

--

wpt-commits: 3b4953ad7022f11d7e756404bd0c34a059431993
wpt-pr: 40218

UltraBlame original commit: cb8731f862c32ac8e42e2c845710f56523047d72

testing/web-platform/tests/scroll-animations/css/animation-timeline-ignored.tentative.html

@@ -98,19 +98,9 @@
 :
 0px
 ;
-scroll
--
 timeline
 -
-attachment
-:
-defer
-;
-scroll
--
-timeline
--
-name
+scope
 :
 -
 -
@@ -138,14 +128,6 @@
 :
 100px
 ;
-scroll
--
-timeline
--
-attachment
-:
-ancestor
-;
 }
 .
 scroller

testing/web-platform/tests/scroll-animations/css/animation-timeline-multiple.html

@@ -106,19 +106,9 @@
 >
 main
 {
-scroll
--
 timeline
 -
-attachment
-:
-defer
-;
-scroll
--
-timeline
--
-name
+scope
 :
 -
 -
@@ -149,14 +139,6 @@
 :
 100px
 ;
-scroll
--
-timeline
--
-attachment
-:
-ancestor
-;
 }
 .
 scroller