Test that setPointerCapture in a different document fails.
Adds tests for the updated step 5 of setting pointer capture[1]
which expects that a pointer can only be captured to its
active document.
[1] https://w3c.github.io/pointerevents/#setting-pointer-capture
Bug: 357041460
Change-Id: I95fd61b56a869cdb68ffeee5ab7d304941761d11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5759832
Commit-Queue: Robert Flack flackr@chromium.org
Reviewed-by: Mustaq Ahmed mustaq@chromium.org
Cr-Commit-Position: refs/heads/main@{#1347602}