There's no need for this code to be completely architecture specific.

Bug: v8:6563
Change-Id: I90aa1aa76fa266a247d8f374459a6eb6469c8c75
Reviewed-on: https://chromium-review.googlesource.com/612340
Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47493}