Add a new options argument to document.caretPositionFromPoint API.
Per w3c/csswg-drafts#10345, we should change
shadowRoots parameter from a rest parameter to a dictionary which
contains an array of shadow roots.
Bug: 41487363
Change-Id: I0686d1eae75797ae07cad215a71a24ab54c7398d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5553027
Reviewed-by: Mason Freed masonf@chromium.org
Reviewed-by: Koji Ishii kojii@chromium.org
Reviewed-by: Sanket Joshi sajos@microsoft.com
Commit-Queue: Siye Liu siliu@microsoft.com
Cr-Commit-Position: refs/heads/main@{#1308173}