The optimization keeps dying maps alive for several GCs to mitigate
code deoptimization with weak maps.

This patch disables the optimization to see if it still needed.

Bug: 
Change-Id: Ie5717967ad56858e6ae546c90fde73e8d5bcc4ec
Reviewed-on: https://chromium-review.googlesource.com/712598Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48458}