Revert "Fix stack trace accessor behavior."

This reverts r22089.

TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/360033002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22091 ce2b1a6d-e550-0410-aec6-3dcde31c8c00