This allows us to avoid a separate receiver typecheck in a few places
without regressing the error messages generated.

As more Array methods move to C++, this will get more usage.

Bug: v8:3577
Change-Id: Ibdd17c781548520172ce62442bc3a800e5c09e99
Reviewed-on: https://chromium-review.googlesource.com/486103Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44904}