The testing is a bit tricky because we need to obtain a frame
pointer (EBP on IA-32) from inside of a function. This is especially
interesting in case of a compiled JavaScript function.

Review URL: http://codereview.chromium.org/28112

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1365 ce2b1a6d-e550-0410-aec6-3dcde31c8c00