These fields relied on the assumption that 64-bit big-endian
architectures had sizeof(int) == 4. Any architecture violating this
assumption would result in an OOB access.

Bug: 
Change-Id: I682ecb6a2da2cf84e8b24f1c1e608d7fc23f5bdc
Reviewed-on: https://chromium-review.googlesource.com/793431Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49673}