Revert of ES6: Make Map/Set constructors support iterable values

Revert of ES6: Make Map/Set constructors support iterable values (patchset #4 of https://codereview.chromium.org/466003002/)

Reason for revert:
TestSetConstructorIterableValue(WeakSet) fails on x64.debug

Original issue's description:
> ES6: Make Map/Set constructors support iterable values
> 
> Same for WeakMap/WeakSet
> 
> https://bugs.ecmascript.org/show_bug.cgi?id=3111
> 
> BUG=v8:3508
> LOG=Y
> R=dslomov@chromium.org
> 
> Committed: https://code.google.com/p/v8/source/detail?r=23091

TBR=adamk@chromium.org,dslomov@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=v8:3508

[arv (Not doing code reviews), 2014-08-12 21:28:36]

Created Revert of ES6: Make Map/Set constructors support iterable values

[commit-bot: I haz the power, 2014-08-12 21:28:54]

CQ is trying da patch. Follow status at
 https://v8-status.appspot.com/cq/arv@chromium.org/465023002/1

[commit-bot: I haz the power, 2014-08-12 21:28:54]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-08-12 21:28:55]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[arv (Not doing code reviews), 2014-08-12 21:31:28]

The CQ bit was checked by arv@chromium.org

[commit-bot: I haz the power, 2014-08-12 21:31:59]

CQ is trying da patch. Follow status at
 https://v8-status.appspot.com/cq/arv@chromium.org/465023002/1

[commit-bot: I haz the power, 2014-08-12 21:32:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-08-12 21:32:07]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.