This reverts commit 4260f605.

Reason for revert: Speculative revert for https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20ASAN

Original change's description:
> [heap] Move ArrayBufferTracker updating to pointers updating
> 
> Bug: chromium:651354
> Change-Id: I2c318dd3cb0885fd8186d4c13a91840498a217b2
> Reviewed-on: https://chromium-review.googlesource.com/550097
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46269}

TBR=ulan@chromium.org,mlippautz@chromium.org

Change-Id: Ie5b828f909e140bf5b4b17353999d598e6367622
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:651354
Reviewed-on: https://chromium-review.googlesource.com/552177Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46274}