IDL compiler: ForMainWorld for method arguments

Source/bindings/scripts/unstable/v8_methods.py

Index: Source/bindings/scripts/unstable/v8_methods.py
diff --git a/Source/bindings/scripts/unstable/v8_methods.py b/Source/bindings/scripts/unstable/v8_methods.py
index 8608f827ad541b8b1941e5523b964017f0a90c4c..32467c06ba2ef8f462639ecb98e11b2966fff333 100644
--- a/Source/bindings/scripts/unstable/v8_methods.py
+++ b/Source/bindings/scripts/unstable/v8_methods.py
@@ -152,6 +152,7 @@ def generate_argument(interface, method, argument, index):
         'is_variadic_wrapper_type': argument.is_variadic and v8_types.is_wrapper_type(idl_type),
         'is_wrapper_type': v8_types.is_wrapper_type(idl_type),
         'name': argument.name,
+        'v8_set_return_value_for_main_world': v8_set_return_value(interface.name, method, this_cpp_value, for_main_world=True),
         'v8_set_return_value': v8_set_return_value(interface.name, method, this_cpp_value),
         'v8_value_to_local_cpp_value': v8_value_to_local_cpp_value(argument, index),
     }