Disable handle zapping in release builds on branch 3.23

R=jkummerow@chromium.org
BUG=318206
LOG=n

Review URL: https://codereview.chromium.org/109553003

git-svn-id: https://v8.googlecode.com/svn/branches/3.23@18338 ce2b1a6d-e550-0410-aec6-3dcde31c8c00