Revert "(Pre)Parser: Simplify NewExpression handling."

This reverts revision 19386.

Reason: Mozilla failures.

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

Review URL: https://codereview.chromium.org/164183006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19388 ce2b1a6d-e550-0410-aec6-3dcde31c8c00