R=sgjesse@chromium.org,vitalyr@chromium.org
BUG=1398
TEST=cctest/test-cpu-profiler/Issue1398

Review URL: http://codereview.chromium.org/7046001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7949 ce2b1a6d-e550-0410-aec6-3dcde31c8c00