[Bindings][Refactoring] Move logics of preparePrototypeAndInterfaceObject from .tmpl to .py

third_party/WebKit/Source/bindings/templates/partial_interface.cpp.tmpl

Index: third_party/WebKit/Source/bindings/templates/partial_interface.cpp.tmpl
diff --git a/third_party/WebKit/Source/bindings/templates/partial_interface.cpp.tmpl b/third_party/WebKit/Source/bindings/templates/partial_interface.cpp.tmpl
index 25e79e8fc7d6d50cbd3249c82f0ad51aa42fe4f8..04f17cdb8ff158530e48adcd57285c0c693b03aa 100644
--- a/third_party/WebKit/Source/bindings/templates/partial_interface.cpp.tmpl
+++ b/third_party/WebKit/Source/bindings/templates/partial_interface.cpp.tmpl
@@ -1,14 +1,5 @@
 {% extends 'interface_base.cpp.tmpl' %}
 
-{% set has_prepare_prototype_and_interface_object =
-    unscopables or has_conditional_attributes_on_prototype or
-    methods | conditionally_exposed(is_partial) %}
-{% set prepare_prototype_and_interface_object_func =
-    '%s::preparePrototypeAndInterfaceObject' % v8_class_or_partial
-    if has_prepare_prototype_and_interface_object
-    else 'nullptr' %}
-
-
 {##############################################################################}
 {% block partial_interface %}
 void {{v8_class_or_partial}}::initialize() {
@@ -20,7 +11,7 @@ void {{v8_class_or_partial}}::initialize() {
       {% else %}
       nullptr,
       {% endif %}
-      {{prepare_prototype_and_interface_object_func}});
+      {{prepare_prototype_and_interface_object_func or 'nullptr'}});
   {% for method in methods %}
   {% if method.overloads and method.overloads.has_partial_overloads %}
   {{v8_class}}::register{{method.name | blink_capitalize}}MethodForPartialInterface(&{{cpp_class_or_partial}}V8Internal::{{method.name}}Method);