Move AcceptWithResponder() out of the MessageReceiver interface.

mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl

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 ef091d6b29ded1c6d3c8af6ea006a417753b9ce1..0d605a6bd75d47dd6e8872ac7dd624d281740f68 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/interface_definition.tmpl
@@ -77,12 +77,6 @@ class {{class_name}}_{{method.name}}_ForwardToCallback
       : callback_(callback) {
   }
   virtual bool Accept(mojo::Message* message) MOJO_OVERRIDE;
-  virtual bool AcceptWithResponder(
-      mojo::Message* message,
-      mojo::MessageReceiver* responder) MOJO_OVERRIDE {
-    assert(false);
-    return false;
-  }
  private:
   {{interface_macros.declare_callback(method)}} callback_;
   MOJO_DISALLOW_COPY_AND_ASSIGN({{class_name}}_{{method.name}}_ForwardToCallback);
@@ -102,7 +96,7 @@ bool {{class_name}}_{{method.name}}_ForwardToCallback::Accept(
 {%-   endif %}
 {%- endfor %}
 
-{{proxy_name}}::{{proxy_name}}(mojo::MessageReceiver* receiver)
+{{proxy_name}}::{{proxy_name}}(mojo::MessageReceiverWithResponder* receiver)
     : receiver_(receiver) {
 }