It looks like we initialize TickSample values twice in some
situations, but I will fix this in a separate change list.

R=sgjesse@chromium.org
BUG=1292
TEST=none

Review URL: http://codereview.chromium.org/6756031

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7434 ce2b1a6d-e550-0410-aec6-3dcde31c8c00