Umbrella bug for sub pixel scroll position support.
<rdar://problem/86535697>
See also https://bugs.chromium.org/p/chromium/issues/detail?id=373731
Also note that https://bugs.chromium.org/p/chromium/issues/detail?id=360889 was closed as WONTFIX
https://groups.google.com/a/chromium.org/g/input-dev/c/aHvI3yRpqyk