This patch re-writes the call-function-on-async.js test according
to the new style.

R=kozy

Change-Id: I0541d336fe2bba3197170b0cc22c70e96d8543aa
Reviewed-on: https://chromium-review.googlesource.com/636691Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47621}