IDL: Check method.visible for methods implemented in private script

Source/bindings/templates/interface_base.cpp

Index: Source/bindings/templates/interface_base.cpp
diff --git a/Source/bindings/templates/interface_base.cpp b/Source/bindings/templates/interface_base.cpp
index 2cd13d5e0e60dc5ec375609d960eee02a1170f3e..6d765b366eff4732995bd3ae7aa57965cda2b207 100644
--- a/Source/bindings/templates/interface_base.cpp
+++ b/Source/bindings/templates/interface_base.cpp
@@ -482,7 +482,7 @@ static void install{{v8_class}}Template(v8::Local<v8::FunctionTemplate> function
 {% block to_active_dom_object %}{% endblock %}
 {% block get_shadow_object_template %}{% endblock %}
 {% block ref_object_and_deref_object %}{% endblock %}
-{% for method in methods if method.is_implemented_in_private_script %}
+{% for method in methods if method.is_implemented_in_private_script and method.visible %}
 {{method_implemented_in_private_script(method)}}
 {% endfor %}
 {% for attribute in attributes if attribute.is_implemented_in_private_script %}