In order to not confuse this with wasm memory.

R=mstarzinger@chromium.org

Bug: v8:8238
Change-Id: Ife183162a902ab1d141f6af95a9fa487a52379a1
Reviewed-on: https://chromium-review.googlesource.com/c/1296483
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56936}