Store the rest raw data fields as ints.

Bug: v8:6470
Change-Id: I3d4ab56a722ed6c0b5cb30ecee2d94d7c8f07b40
Reviewed-on: https://chromium-review.googlesource.com/526638
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45775}