Automatic update from web-platform-tests [animation-trigger] Deflake compositor-timeline-trigger tests These timeline-trigger WPTs test that scrolling triggers an animation by initiating scrolling from the main thread. In these cases, the tests need to wait for 2 commits: - one commit so that the compositor trigger can observe the scroll update, and - one commit so that the main thread can observe the compositor trigger response to the scroll update. Bug: 390314945, 451238244 Change-Id: I25f7344e52923098ad00625cf239be5e21267766 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7979541 Reviewed-by: Kevin Ellis <kevers@chromium.org> Commit-Queue: David A <awogbemila@chromium.org> Cr-Commit-Position: refs/heads/main@{#1652617} -- wpt-commits: bb9284cdc8d2b68ee1ae09986cb1977078218709 wpt-pr: 60910