Revert "Reland "[page_allocator] Support predictable ASLR calculation for fuzzers.""

This reverts commit 965035031d5a8cf99f5844a086260c107ff7ba25.

Reason for revert: failing AddressSpaceRandomizationTest.Predictable on Win 7 Tests x64 (1)
https://build.chromium.org/p/chromium.win/builders/Win%207%20Tests%20x64%20%281%29/builds/30329

Original change's description:
> Reland "[page_allocator] Support predictable ASLR calculation for fuzzers."
> 
> This is a reland of 0ad0d0517ee1cb9ee6fe8ad57d4f5997cb27eb3f
> Original change's description:
> > [page_allocator] Support predictable ASLR calculation for fuzzers.
> > 
> > - Adds a 'initial_seed' parameter to GetRandomPageBase, which defaults
> >   to 0. If non-zero, generates a predictable sequence, using the value
> >   as the initial seed.
> > - Adds a unit test for the predictable sequence.
> > 
> > Bug: chromium:756050
> > Change-Id: Iaf718baa2b7d49dc8eda7b0f97aa12b576ddca28
> > Reviewed-on: https://chromium-review.googlesource.com/703509
> > Commit-Queue: Bill Budge <bbudge@chromium.org>
> > Reviewed-by: Chris Palmer <palmer@chromium.org>
> > Reviewed-by: Kentaro Hara <haraken@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#509575}
> 
> Bug: chromium:756050
> Change-Id: I4652c70a5732395b494caea0d1a53a17a631bb32
> Reviewed-on: https://chromium-review.googlesource.com/738220
> Commit-Queue: Bill Budge <bbudge@chromium.org>
> Reviewed-by: Chris Palmer <palmer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#511618}

TBR=palmer@chromium.org,bbudge@chromium.org,haraken@chromium.org

Change-Id: I88ac9d0fb8d190d2a40d56e63b45047508201c68
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:756050
Reviewed-on: https://chromium-review.googlesource.com/738245
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511764}

• base/allocator/partition_allocator/address_space_randomization.cc[diff]
• base/allocator/partition_allocator/address_space_randomization.h[diff]
• base/allocator/partition_allocator/address_space_randomization_unittest.cc[diff]