Convert UnaryOpStub to a HydrogenCodeStub

BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/18712002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15506 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add trampoline to enable pointer -> handle code calls

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/18550002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15507 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handlify GlobalObject::EnsurePropertyCell method.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/18348013

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15508 ce2b1a6d-e550-0410-aec6-3dcde31c8c00