Revert "sqlite: Disable mmap usage on Windows."

This reverts commit 7202f4dc1ffc2b6f2268532055ec1b455fce64d2.

Reason for revert: CL is only needed in 72.0.3620.0 Windows Canary to diagnose SQLite crashes.

Original change's description:
> sqlite: Disable mmap usage on Windows.
>
> This is an experiment to see if the crashes in the referenced bug are
> related to mmap changes on Windows. This CL will be reverted after it
> goes live in 1-2 canaries.
>
> TBR=cmumford
>
> Bug: 897576
> Change-Id: Ic44836c4ed848f8713d16b553f038c63119f0aaf
> Reviewed-on: https://chromium-review.googlesource.com/c/1348736
> Commit-Queue: Victor Costan <pwnall@chromium.org>
> Reviewed-by: Victor Costan <pwnall@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#610551}

TBR=cmumford@chromium.org,pwnall@chromium.org

Change-Id: I4d79a63c2a428e1e8ab04143a4d8280e274db1fd
Bug: 897576
Reviewed-on: https://chromium-review.googlesource.com/c/1349789
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610700}
2 files changed