This reverts commit ee0e295d.

Suspect for http://crbug.com/736676
Another dcheck fails, starting after the reverted CL, e.g.:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064%20%28dbg%29/builds/8666

BUG=chromium:736676,v8:6361
TBR=kschimpf@chromium.org,mtrofin@chromium.org
NOTRY=true
NOPRESUBMIT=true

Change-Id: I160b996a07d77f90a96864f3ae84f861f495ed42
Reviewed-on: https://chromium-review.googlesource.com/547425Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46196}