Reland of [proxies] Make Object.prototype.isPrototypeOf work with proxies. (patchset #1 id:1 of https://codereview.chromium.org/1494283002/ )

Reason for revert:
Did not help...

Original issue's description:
> Revert of [proxies] Make Object.prototype.isPrototypeOf work with proxies. (patchset #2 id:20001 of https://codereview.chromium.org/1492863002/ )
>
> Reason for revert:
> [Sheriff] Speculative revert for:
> https://uberchromegw.corp.google.com/i/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/3225
>
> Can just be relanded if it doesn't get green.
>
> Original issue's description:
> > [proxies] Make Object.prototype.isPrototypeOf step into proxies.
> >
> > R=rossberg, verwaest@chromium.org
> > BUG=v8:1543
> > LOG=n
> >
> > Committed: https://crrev.com/4ca1180d2e7c409312ae0761cb12843989466573
> > Cr-Commit-Position: refs/heads/master@{#32569}
>
> TBR=rossberg@chromium.org,verwaest@chromium.org,neis@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:1543
>
> Committed: https://crrev.com/48fba9439f291edd5929e19951262dc7e8a09609
> Cr-Commit-Position: refs/heads/master@{#32588}

TBR=rossberg@chromium.org,verwaest@chromium.org,neis@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1543

Review URL: https://codereview.chromium.org/1491743010

Cr-Commit-Position: refs/heads/master@{#32598}