Disable handle zapping on V8 3.30 branch

BUG=chromium:318206
R=jkummerow@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/716583002

git-svn-id: https://v8.googlecode.com/svn/branches/3.30@25248 ce2b1a6d-e550-0410-aec6-3dcde31c8c00