Instead, remember the canonical handle during SerializeStandardObjects.

Bug: v8:7790
Change-Id: Id57d861e92088fbc64c05fbee1612376000c06c9
Reviewed-on: https://chromium-review.googlesource.com/1233494Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56029}