Revert "Traitify ParserBase and move functions there."

This reverts commit r19230.

Reason: Build failures on NaCl.

BUG=
TBR=marja@chromium.org,mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/158873006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19234 ce2b1a6d-e550-0410-aec6-3dcde31c8c00