Tests are failing in debug mode.

This also reapplies the change "Make Date and RegExp inherit from
Object in the API" that I accidentally reverted.

R=sgjesse@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/6927009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7775 ce2b1a6d-e550-0410-aec6-3dcde31c8c00