Don't expose Array.prototype.values as it breaks webcompat
Some versions of Outlook Web Access test for the existence of a 'values'
property on Array instances, so adding the 'values' iterator to the prototype
(even with @@unscopeables) causes breakage.
This matches Gecko: they ship Array.prototype.{keys,entries} but not 'values'.
BUG=409858
LOG=Y
R=arv@chromium.org, danno@chromium.org
Review URL: https://codereview.chromium.org/
647703003
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24706
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00