Mojom runtime type info: New implementation for Dart.

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

 {%- for method in interface.methods %}
 const int _{{interface|name}}_{{method|name}}Name = {{method.ordinal}};
 {%- endfor %}
 
 {#--- Interface Enums #}
 {%- from "enum_definition.tmpl" import enum_def -%}
 {%- for enum in interface.enums %}
   {{ enum_def(enum, typepkg, package) }}
 {%-  endfor %}
 
-{% if should_gen_mojom_types -%}
-{{ mojom_type_macros.writeMojomTypeDef(interface, typepkg, package) }}
-{%- endif %}
-
 class _{{interface|name}}ServiceDescription implements {{descpkg}}ServiceDescription {
-{%- if should_gen_mojom_types %}
-  dynamic getTopLevelInterface([Function responseFactory]) =>
-    responseFactory(_{{interface|mojom_type_identifier|lower_camel}}());
+{%- if should_gen_mojom_types and interface.service_name %}

[alexfandrianto, 2016/03/02 05:27:12]

It may be worth noting explicitly in the CL description that, like Go, Dart
interfaces will only receive the full service description if they also have a
service name. Doing so helps explain the changes in some of the
_mojo_for_test_only *.mojom.dart files, where their service description
implementations are now returning null.

[rudominer, 2016/03/03 01:09:36]

Good suggestion. Done.

+  dynamic getTopLevelInterface([Function responseFactory]){
+    var interfaceTypeKey = getRuntimeTypeInfo().servicesByName["{{interface.service_name}}"].topLevelInterface;
+    var userDefinedType = getAllMojomTypeDefinitions()[interfaceTypeKey];
+    return responseFactory(userDefinedType.interfaceType);
+  }
 
   dynamic getTypeDefinition(String typeKey, [Function responseFactory]) =>
     responseFactory(getAllMojomTypeDefinitions()[typeKey]);
 
   dynamic getAllTypeDefinitions([Function responseFactory]) =>
     responseFactory(getAllMojomTypeDefinitions());
 {%- else %}
   dynamic getTopLevelInterface([Function responseFactory]) =>
       responseFactory(null);
 
@@ skipping 306 matching lines @@
   int get version => {{interface.version}};
 
   static {{descpkg}}ServiceDescription _cachedServiceDescription;
   static {{descpkg}}ServiceDescription get serviceDescription {
     if (_cachedServiceDescription == null) {
       _cachedServiceDescription = new _{{interface|name}}ServiceDescription();
     }
     return _cachedServiceDescription;
   }
 }