In stress testing, the output is repeated several times. In this case, it is now compared several times to the actual output.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18062002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15369 ce2b1a6d-e550-0410-aec6-3dcde31c8c00