GitLab

Refactor the current frame sink id hit test API and
reuse it to scroller target finding to be used in
compositor.
This will be used in the scroll targeting in
scroll unification project in the follow up CLs.
For more information look at:
https://docs.google.com/document/d/1smLAXs-DSLLmkEt4FIPP7PVglJXOcwRc7A5G0SEwxaY/edit#heading=h.hykhktoizkjj

Bug: 1047179
Change-Id: Ie7001e5342a99eff85dc078c65a958a4c65f1120
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2070383Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Navid Zolghadr <nzolghadr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#754976}