In case of Node.js (and Electron) we are guaranteed to always have only
off-heap typed arrays, indicated by V8_TYPED_ARRAY_MAX_SIZE_IN_HEAP
being 0. So we can leverage this fact in TurboFan to generate more
efficient code, avoiding the offset computation.

Bug: v8:7253
Change-Id: I97db0dfec21c594ff8be0f1d405e828c7ae38c33
Reviewed-on: https://chromium-review.googlesource.com/962243Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51921}