Revert of Disable non-standard Promise functions in staging

Revert of Disable non-standard Promise functions in staging (patchset #5 id:80001 of https://codereview.chromium.org/1469543003/ )

Reason for revert:
[Sheriff] This breaks ignition on arm sim debug:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm%20-%20sim%20-%20debug/builds/5317

Seems to not be caught by the cq bot that builds release with dchecks.

Original issue's description:
> Disable non-standard Promise functions in staging
>
> This patch removes Promise functions and methods which are absent
> from the ES2015 specification when the --es-staging flag is on.
>
> BUG=v8:3237
> R=rossberg
> LOG=Y
>
> Committed: https://crrev.com/941251af7e04d50ac2243da2870249a42111221a
> Cr-Commit-Position: refs/heads/master@{#32194}

TBR=rossberg@chromium.org,littledan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3237
Committed: https://crrev.com/86bd2b3c23b562213d5af158849dcd65f347a827
Cr-Commit-Position: refs/heads/master@{#32199}

[Michael Achenbach, 2015-11-24 10:57:25]

Created Revert of Disable non-standard Promise functions in staging

[commit-bot: I haz the power, 2015-11-24 10:57:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1473603002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1473603002/1

[Michael Achenbach, 2015-11-24 10:57:47]

machenbach@chromium.org changed reviewers:
+ rmcilroy@chromium.org

[Michael Achenbach, 2015-11-24 10:57:47]

FYI Ross

[commit-bot: I haz the power, 2015-11-24 10:57:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-24 10:58:11]

Patchset 1 (id:??) landed as
https://crrev.com/86bd2b3c23b562213d5af158849dcd65f347a827
Cr-Commit-Position: refs/heads/master@{#32199}

[Dan Ehrenberg, 2015-11-24 23:17:25]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1478533002/ by littledan@chromium.org.

The reason for reverting is: Breakage in Ignition seems unrelated; relanding..