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..665b71dca61eacf379a456ddb69e27121ebf1adb 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_callback else
+       '{0}V8Internal::{0}ConstructorGetter'.format(cpp_class)) %}
 {% set getter_callback_for_main_world =
        '%sV8Internal::%sAttributeGetterCallbackForMainWorld' %
             (cpp_class, attribute.name)
@@ -74,7 +77,6 @@ static void {{cpp_class}}ConstructorGetter(v8::Local<v8::String>, const v8::Prop
 {% endif %}
 {% endblock %}
 
-
 {##############################################################################}
 {% block replaceable_attribute_setter_and_callback %}
 {% if has_replaceable_attributes or has_constructor_attributes %}