It seems more appropriate as LiteralScope is declared in scanner.h

R=lrn@chromium.org
Signed-off-by: Thiago Farina <tfarina@chromium.org>

Review URL: http://codereview.chromium.org/7864024
Patch from Thiago Farina <tfarina@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9222 ce2b1a6d-e550-0410-aec6-3dcde31c8c00