Revert 20313 - "Ship promises and weak collections"

> R=mstarzinger@chromium.org
> BUG=
>
> Committed: https://code.google.com/p/v8/source/detail?r=20211
>
> Review URL: https://codereview.chromium.org/206163004

R=rossberg@chromium.org
TBR=rossberg@chromium.org
LOG=y
BUG=n

Review URL: https://codereview.chromium.org/219303002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20353 ce2b1a6d-e550-0410-aec6-3dcde31c8c00