[runtime] Store constructor function index on primitive maps.

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index 7b937fe3d2eb129b0d3a70546946d16cfdb5cd22..d7fca528017af6a2842f0fa752bcb728b59e0854 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -1193,7 +1193,7 @@ RUNTIME_FUNCTION(Runtime_LoadMutableDouble) {
       FieldIndex::ForLoadByFieldIndex(object->map(), index->value());
   if (field_index.is_inobject()) {
     RUNTIME_ASSERT(field_index.property_index() <
-                   object->map()->inobject_properties());
+                   object->map()->GetInObjectProperties());
   } else {
     RUNTIME_ASSERT(field_index.outobject_array_index() <
                    object->properties()->length());