Revert r14252 as it broke --prof for some cases

R=jkummerow
BUG=v8:2642

Review URL: https://codereview.chromium.org/14367020

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14348 ce2b1a6d-e550-0410-aec6-3dcde31c8c00