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There is a core trampler in Android and the belief is that it's a
use-after-free bug.  Unfortunately, there is no information about what
object was previously allocated to the memory being trampled.  This
will track freed objects and the stack at the moment it was freed,
making that information available for when the corruption is detected.

Bug: 744734
Change-Id: Iffbd5c8e6cbfcb98298d835b5514f43b821b70cd
Reviewed-on: https://chromium-review.googlesource.com/662277
Commit-Queue: Brian White <bcwhite@chromium.org>
Reviewed-by: Dmitry Skiba <dskiba@chromium.org>
Reviewed-by: Primiano Tucci <primiano@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503527}