... by avoiding reads through timer objects allocated on stack of another thread and
explicitly maintaining current RuntimeCallCounter object in RuntimeCallStats instead.

Change-Id: I54eaf078dc1e77dc47ded963903d54ffb583f377
Reviewed-on: https://chromium-review.googlesource.com/471667Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44491}