Make snap events bubble when fired at the document.
The CSS working group came to a resolution[1] that snap events should
bubble when targeted at the document.
This aligns with the behavior of scroll and scrollend events.
Bug: 40286359, 40273052
Change-Id: Ie977a39df04c5ee0bd7f62319119603a59ed7c22
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5513923
Reviewed-by: Steve Kobes skobes@chromium.org
Commit-Queue: David Awogbemila awogbemila@chromium.org
Cr-Commit-Position: refs/heads/main@{#1296898}