Revert "Convert UnaryOpStub to a HydrogenCodeStub"

The problem is the HCallConstantFunction which is not context sensitive, so we leak the builtin. We first need a Hydrogen version of __ IvokeBuiltin.

BUG=
R=danno@chromium.org, machenbach@chromium.org

Review URL: https://codereview.chromium.org/18650003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15486 ce2b1a6d-e550-0410-aec6-3dcde31c8c00