This reverts commit 2ade52e9.

Reason for revert: still breaks internal bots, e.g. https://uberchromegw.corp.google.com/i/internal.client.v8/builders/v8_nexus7_perf

Original change's description:
> Reland "[test] Add JSTest benchmark for object literal spread"
> 
> This reverts commit cd1dd34f.
> 
> Patchset 1 is the original CL that was reverted. Patchset 2 has the
> fix.
> 
> TBR=bmeurer@chromium.org
> 
> Bug: v8:7611
> Change-Id: I15291175ab894ef667c001e1b21b8b220e1f9b48
> Reviewed-on: https://chromium-review.googlesource.com/993995
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52337}

TBR=gsathya@chromium.org,bmeurer@chromium.org

Change-Id: Ie7da3a02df16df716293d0104f1f7d16208f1baf
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7611
Reviewed-on: https://chromium-review.googlesource.com/995294Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52347}