[Sheriff] Make flaky cpu profiler test.

BUG=v8:2999
TBR=yurys@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/133443003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00