Function ElementsAreSafeToExamine was undefined in release heap verify.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c0835e21eb9cb5d3df0d1f5ad1e464b6d4022323..e8c985048455e406c77c6b4c6814261f2cb7ab41 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2595,12 +2595,15 @@ class JSObject: public JSReceiver {
   };
 
   void IncrementSpillStatistics(SpillInformation* info);
+#endif
 
+#ifdef VERIFY_HEAP
   // If a GC was caused while constructing this object, the elements pointer
   // may point to a one pointer filler map. The object won't be rooted, but
   // our heap verification code could stumble across it.
   bool ElementsAreSafeToExamine();
 #endif
+
   Object* SlowReverseLookup(Object* value);
 
   // Maximal number of fast properties for the JSObject. Used to