Fix test-api/ObjectProtoToStringES6

Fix test-api/ObjectProtoToStringES6

Fixes tree closure caused by r26415

BUG=v8:3502
R=arv@chromium.org
LOG=N

Committed: https://crrev.com/600474ad442c2bc1740710b03fa4b5ab785e9f1b
Cr-Commit-Position: refs/heads/master@{#26416}

[caitp (gmail), 2015-02-03 21:41:44]

PTAL --- this works for me when running the failed commands listed in
http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug/build...

So I think that should fix it... other option is revert, apply fix and re-land I
guess? Up to you

[arv (Not doing code reviews), 2015-02-03 21:50:21]

LGTM

[caitp (gmail), 2015-02-03 21:50:53]

On 2015/02/03 21:50:21, arv wrote:
> LGTM

I don't think I can land via the CQ since the tree is closed :x

[caitp (gmail), 2015-02-03 21:55:58]

The CQ bit was checked by caitpotter88@gmail.com

[commit-bot: I haz the power, 2015-02-03 21:56:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/869773005/1

[commit-bot: I haz the power, 2015-02-03 22:18:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-03 22:18:34]

Patchset 1 (id:??) landed as
https://crrev.com/600474ad442c2bc1740710b03fa4b5ab785e9f1b
Cr-Commit-Position: refs/heads/master@{#26416}