Set Message{Is,Expects} response correctly in go bindings

mojo/public/tools/bindings/generators/go_templates/interface.tmpl

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 {% import "struct.tmpl" as struct_macros %}
 
 {%- macro declare_params(struct) %}
 {%- for field in struct.fields -%}
         {{field|name(False)}} {{field.kind|go_type}}{% if not loop.last %}, {% endif %}
 {%- endfor %}
 {%- endmacro %}
 
 
 
 {% macro declare_request_params(method) %}
 ({{declare_params(method|struct_from_method)}})
 {%- if method.response_parameters|is_none_or_empty -%}
         {{' (err error)'}}
 {%- else -%}
         {{' '}}({{declare_params(method|response_struct_from_method)}}, err error)
 {%- endif -%}
 {% endmacro %}
 
 
 
-{%- macro flags(response_parameters, is_renponse) -%}
+{%- macro flags(response_parameters, is_response) -%}
 {%- if not response_parameters -%}
         bindings.MessageNoFlag
-{%- elif is_parameter: -%}
+{%- elif is_response: -%}
+        bindings.MessageIsResponseFlag
+{%- else -%}
         bindings.MessageExpectsResponseFlag
-{%- else -%}
-        bindings.MessageIsResponseFlag
 {%- endif -%}
 {%- endmacro -%}
 
 
 
 {% macro define(interface) %}
 type {{interface|name}} interface {
 {% for method in interface.methods %}
         {{method|name}}{{declare_request_params(method)}}
 {% endfor %}
@@ skipping 113 matching lines @@
                 return s.connector.WriteMessage(message)
 {%   endif %}
 {% endfor %}
         default:
                 return fmt.Errorf("unsupported request type %v", message.Header.Type);
         }
         return
 }
 
 {% endmacro %}