Accidentally, remembered sets for slots and source objects were passed
by value when visiting.

Bug: chromium:1029379
Change-Id: I1942a13605990c0b13c378d33d3ace602daddf0d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3545318
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Auto-Submit: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79591}