Just to get the RuntimeCallstats data. To be reverted soon.

BUG=v8:5516
NOTREECHECKS=true

Change-Id: I4bb436900a79bb383bf8132002a129b601efdfe3
Reviewed-on: https://chromium-review.googlesource.com/618987Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47416}