[scroll-animations] Modernize at-scroll-timeline.ignored.tentative.html

Bug: 1317765
Change-Id: I8888fae74d338a264ba9f51ffc3f48316266e72b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3855982
Reviewed-by: Robert Flack <flackr@chromium.org>
Commit-Queue: Anders Hartvoll Ruud <andruud@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1040590}
diff --git a/scroll-animations/css/at-scroll-timeline-ignored.tentative.html b/scroll-animations/css/animation-timeline-ignored.tentative.html
similarity index 94%
rename from scroll-animations/css/at-scroll-timeline-ignored.tentative.html
rename to scroll-animations/css/animation-timeline-ignored.tentative.html
index 44d4155..32cb89c 100644
--- a/scroll-animations/css/at-scroll-timeline-ignored.tentative.html
+++ b/scroll-animations/css/animation-timeline-ignored.tentative.html
@@ -20,17 +20,14 @@
     from { width: 100px; }
     to { width: 200px; }
   }
-  @scroll-timeline timeline1 {
-    source: selector(#scroller1);
-    orientation: auto;
+  #scroller1 {
+    scroll-timeline: timeline1;
   }
-  @scroll-timeline timeline2 {
-    source: selector(#scroller2);
-    orientation: auto;
+  #scroller2 {
+    scroll-timeline: timeline2;
   }
-  @scroll-timeline timeline3 {
-    source: selector(#scroller3);
-    orientation: auto;
+  #scroller3 {
+    scroll-timeline: timeline3;
   }
   #element {
     width: 0px;