[runtime] Store constructor function index on primitive maps.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index 5a80d2a04897e6a02b5d1d058a70b7fd4ac1d95b..c278bbc5d1738aa3b9b3c79ba42f2af7a962f2e6 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -264,7 +264,7 @@ void JSObject::JSObjectVerify() {
   }
 
   if (HasFastProperties()) {
-    int actual_unused_property_fields = map()->inobject_properties() +
+    int actual_unused_property_fields = map()->GetInObjectProperties() +
                                         properties()->length() -
                                         map()->NextFreePropertyIndex();
     if (map()->unused_property_fields() != actual_unused_property_fields) {