This is to compare the the no-snapshot build to the
snapshot build when creating an isolate or context.

R=jgruber@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I503cde560b7897b945b3f9d2b445d0abcbfb5b60
Reviewed-on: https://chromium-review.googlesource.com/571744Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46674}