The conditions checked by the CSA IsFastJSArrayWithNoCustomIteration is actually
stronger than that of the runtime IterableToListCanBeElided. In particular,
while IterableToListCanBeElided only checks that the prototype has no element
when the array is holey, IsFastJSArrayWithNoCustomIteration always requires
that the prototype has no element.

Bug: v8:7980
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I28b086428d79682392413fb4182923184d7c1836
Reviewed-on: https://chromium-review.googlesource.com/1183671
Commit-Queue: Hai Dang <dhai@google.com>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55312}