Bring 4554 to the 2.1 branch....

src/runtime.cc

Index: src/runtime.cc
===================================================================
--- src/runtime.cc	(revision 4554)
+++ src/runtime.cc	(working copy)
@@ -4118,7 +4118,7 @@
   int length = LocalPrototypeChainLength(*obj);
 
   // Find the number of local properties for each of the objects.
-  int* local_property_count = NewArray<int>(length);
+  ScopedVector<int> local_property_count(length);
   int total_property_count = 0;
   Handle<JSObject> jsproto = obj;
   for (int i = 0; i < length; i++) {
@@ -4171,7 +4171,6 @@
     }
   }
 
-  DeleteArray(local_property_count);
   return *Factory::NewJSArrayWithElements(names);
 }