Add parameter that allows to request data for scripts by their ids. It's going to be used e.g. to request script sources by their ids.
Review URL: http://codereview.chromium.org/113335

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1941 ce2b1a6d-e550-0410-aec6-3dcde31c8c00