[PM] Lift OwnedObjects DCHECK limit to unblock failing tests

Bug: 346612453
Change-Id: I8816b86929ee5a281724561dd77217ab9a81a8a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5622254


Reviewed-by: Patrick Monette <pmonette@chromium.org>
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Auto-Submit: Joe Mason <joenotcharles@google.com>
Commit-Queue: Joe Mason <joenotcharles@google.com>
Cr-Commit-Position: refs/heads/main@{#1313692}