This variable significantly slows down indexed-getter.html of blink_perf.bindings on linux-perf
https://pinpoint-dot-chromeperf.appspot.com/job/136cce54620000

V8_STACK_UNINITIALIZED macro is the same as http://crrev.com/c/1974951

Bug: chromium:977230

Change-Id: I3e7e91804e13b856d6b2ba0a5d67f0354636c510
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2046872
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
Auto-Submit: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66278}