- Replaces calls to Allocator Reserve, Free, and SetPermissions
  with equivalent page allocator calls (allocation.h).
- Un-implements these methods to catch usage, in preparation for
  removing these.

Bug: chromium:799573
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Id233b7a9cfc8e332c64e514f6359e8b670c2d75e
Reviewed-on: https://chromium-review.googlesource.com/911883
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Eric Holk <eholk@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51340}