1) make it possible to combine tracing logic with accounting allocator
  supporting zone compression,
2) make it possible to record zone memory usage via Chrome tracing
  machinery (especially, for already running process),
3) trace both allocated and actually used memory per zone,

Bug: v8:10572
Change-Id: I768e474ada1a384218af09efd0dfce2d9a43ac3c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2228888
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68197}