BUG=v8:2033
TEST='list' command works in d8 debugger.
Review URL: https://chromiumcodereview.appspot.com/9861017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11155 ce2b1a6d-e550-0410-aec6-3dcde31c8c00