| Index: mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl | 
| diff --git a/mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl | 
| index b3c64233ff2b5286b7542cadeada98db6a9eff2a..4017fc51d18c0f60e69f471c48751545640cfbe8 100644 | 
| --- a/mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl | 
| +++ b/mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl | 
| @@ -265,7 +265,8 @@ class {{class_name}}_{{method.name}}_ProxyToResponder | 
|  | 
| void Run( | 
| {{interface_macros.declare_responder_params( | 
| -          "in_", method.response_parameters, for_blink)}}); | 
| +          "in_", method.response_parameters, for_blink, | 
| +          use_new_wrapper_types)}}); | 
|  | 
| uint64_t request_id_; | 
| bool is_sync_; | 
| @@ -278,7 +279,8 @@ class {{class_name}}_{{method.name}}_ProxyToResponder | 
|  | 
| void {{class_name}}_{{method.name}}_ProxyToResponder::Run( | 
| {{interface_macros.declare_responder_params( | 
| -        "in_", method.response_parameters, for_blink)}}) { | 
| +        "in_", method.response_parameters, for_blink, | 
| +        use_new_wrapper_types)}}) { | 
| {{struct_macros.get_serialized_size(response_params_struct, "in_%s", | 
| "&serialization_context_")}} | 
| mojo::internal::ResponseMessageBuilder builder( | 
|  |