This reverts commit 81b5f713.

Revert "[heap] Cleanup embedder tracing APIs"

This reverts commit ce02d86b.

Tbr: mlippautz@chromium.org
Change-Id: I5900ac3c070c93b869c9173316a466d39287713a
Reviewed-on: https://chromium-review.googlesource.com/c/1350111Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57806}