Disable zapping of global handles in release mode.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/12984006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14028 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

build/common.gypi

@@ -401,7 +401,7 @@
       },  # Debug
       'Release': {
         'variables': {
-          'v8_enable_extra_checks%': 1,
+          'v8_enable_extra_checks%': 0,
         },
         'conditions': [
           ['v8_enable_extra_checks==1', {

src/global-handles.cc

@@ -72,7 +72,7 @@ class GlobalHandles::Node {
                   Internals::kNodeIsPartiallyDependentShift);
   }
 
-#ifdef DEBUG
+#ifdef ENABLE_EXTRA_CHECKS
   ~Node() {
     // TODO(1428): if it's a weak handle we should have invoked its callback.
     // Zap the values for eager trapping.
@@ -111,10 +111,9 @@ class GlobalHandles::Node {
   void Release(GlobalHandles* global_handles) {
     ASSERT(state() != FREE);
     set_state(FREE);
-    // TODO(mstarzinger): Put behind debug flag once embedders are stabilized.
-    object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue);
-#ifdef DEBUG
+#ifdef ENABLE_EXTRA_CHECKS
     // Zap the values for eager trapping.
+    object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue);
     class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId;
     set_independent(false);
     set_partially_dependent(false);