Revert "Use HType::NonPrimitive() for non primitive HConstants."

This reverts commit r18947.

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/147493005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18948 ce2b1a6d-e550-0410-aec6-3dcde31c8c00