Revert "Handlifying clients of StringTable, step 1."

This reverts commit r20772.

TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/239273002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20775 ce2b1a6d-e550-0410-aec6-3dcde31c8c00