This makes the stop-the-world marking visitor the same as incremental
visitor for processing large fixed arrays.

Bug: chromium:1020982
Change-Id: Ie3b4ea7ad397ea0ae00000875aca0d142f672a3f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1897828Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64743}