Support deprecation + use counters for constructor attributes.

Source/bindings/templates/interface.cpp

Index: Source/bindings/templates/interface.cpp
diff --git a/Source/bindings/templates/interface.cpp b/Source/bindings/templates/interface.cpp
index 0c2bedb14fc9967f5e26b20976f8f30a1b297742..656f9f3b08101514e4bd06d6dff98736b5fad8b7 100644
--- a/Source/bindings/templates/interface.cpp
+++ b/Source/bindings/templates/interface.cpp
@@ -7,7 +7,10 @@
        '%sV8Internal::%sAttributeGetterCallback' %
             (cpp_class, attribute.name)
        if not attribute.constructor_type else
-       '{0}V8Internal::{0}ConstructorGetter'.format(cpp_class) %}
+       ('%sV8Internal::%sConstructorGetterCallback' %
+            (cpp_class, attribute.name)
+        if attribute.needs_constructor_getter_callback else
+       '{0}V8Internal::{0}ConstructorGetter'.format(cpp_class)) %}
 {% set getter_callback_for_main_world =
        '%sV8Internal::%sAttributeGetterCallbackForMainWorld' %
             (cpp_class, attribute.name)