Generate Mojom Types in Dart (Take 2)

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

Index: mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
diff --git a/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl b/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
index c8c10cd86b9001dc14e0fa72bb02c03395cdb18e..e53258ce54ab31c37d84fe49d2246b2e33a6d708 100644
--- a/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/dart_templates/interface_definition.tmpl
@@ -5,9 +5,35 @@ const int _{{interface|name}}_{{method|name}}Name = {{method.ordinal}};
 {#--- Interface Enums #}
 {%- from "enum_definition.tmpl" import enum_def -%}
 {%- for enum in interface.enums %}
-  {{ enum_def(enum) }}
+  {{ enum_def(enum, typepkg, package) }}
 {%-  endfor %}
 
+{{ mojom_type_macros.writeMojomTypeDef(interface, typepkg, package) }}
+
+class _{{interface|name}}ServiceDescription implements {{descpkg}}ServiceDescription {
+{% if should_gen_mojom_types -%}
+  dynamic getTopLevelInterface([Function responseFactory = null]) {
+    return {{interface|mojom_type_identifier}}();
+  }
+  dynamic getTypeDefinition(String typeKey,[Function responseFactory = null]) {
+    return getAllMojomTypeDefinitions()[typeKey];
+  }
+  dynamic getAllTypeDefinitions([Function responseFactory = null]) {
+    return getAllMojomTypeDefinitions();
+  }
+{%- else -%}
+  dynamic getTopLevelInterface([Function responseFactory = null]) {
+    return null;
+  }
+  dynamic getTypeDefinition(String typeKey,[Function responseFactory = null]) {
+    return null;
+  }
+  dynamic getAllTypeDefinitions([Function responseFactory = null]) {
+    return null;
+  }
+{%- endif %}
+}
+
 abstract class {{interface|name}} {
 {%- if interface.service_name %}
   static const String serviceName = "{{interface.service_name}}";
@@ -53,6 +79,9 @@ class _{{interface|name}}ProxyImpl extends bindings.Proxy {
     return new _{{interface|name}}ProxyImpl.fromEndpoint(endpoint);
   }
 
+  {{descpkg}}ServiceDescription get serviceDescription =>
+    new _{{interface|name}}ServiceDescription();
+
   void handleResponse(bindings.ServiceMessage message) {
     switch (message.header.type) {
 {%- for method in interface.methods %}
@@ -298,4 +327,8 @@ class {{interface|name}}Stub extends bindings.Stub {
   }
 
   int get version => {{interface.version}};
+
+
+  {{descpkg}}ServiceDescription get serviceDescription =>
+    new _{{interface|name}}ServiceDescription();
 }