GitLab

Freelists must be null-terminated. This is currently not enforced in the
code. This commit removes all "reinterpret_cast<>"s for the freelist,
and enforces null termination.

Bug: 998048
Change-Id: I0593a337ef36693e4ffe08ce8ec04ba679e24183
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2584764Reviewed-by: Chris Palmer <palmer@chromium.org>
Commit-Queue: Benoit L <lizeb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836046}