Temporarily disable deferred stack trace formatting.

R=mstarzinger@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/11859027

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13431 ce2b1a6d-e550-0410-aec6-3dcde31c8c00