Enable zapping of disposed global handles in release mode.

R=hpayer@chromium.org
BUG=chromium:176056

Review URL: https://codereview.chromium.org/12388080

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13818 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/global-handles.cc

@@ -113,10 +113,10 @@ class GlobalHandles::Node {
   void Release(GlobalHandles* global_handles) {
     ASSERT(state() != FREE);
     set_state(FREE);
-    // TODO(176056): Enable as soon as WebKit bindings are fixed.
-#ifdef DEBUG_TODO
-    // Zap the values for eager trapping.
+    // TODO(mstarzinger): Put behind debug flag once embedders are stabilized.
     object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue);
+#ifdef DEBUG
+    // Zap the values for eager trapping.
     class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId;
     set_independent(false);
     set_partially_dependent(false);