Expose Service Describer in Dart mojo package

mojo/dart/packages/mojo_services/lib/mojo/ui/view_associates.mojom.dart

Index: mojo/dart/packages/mojo_services/lib/mojo/ui/view_associates.mojom.dart
diff --git a/mojo/dart/packages/mojo_services/lib/mojo/ui/view_associates.mojom.dart b/mojo/dart/packages/mojo_services/lib/mojo/ui/view_associates.mojom.dart
index 702914bc0b8a1839c08bf3de727d33bfaa42e055..317c8132d0497a32b3d5b7a8545a405f42daa922 100644
--- a/mojo/dart/packages/mojo_services/lib/mojo/ui/view_associates.mojom.dart
+++ b/mojo/dart/packages/mojo_services/lib/mojo/ui/view_associates.mojom.dart
@@ -493,11 +493,14 @@ const int _ViewAssociate_connectToViewTreeServiceName = 2;
 
 
 class _ViewAssociateServiceDescription implements service_describer.ServiceDescription {
-  dynamic getTopLevelInterface([Function responseFactory]) => null;
+  dynamic getTopLevelInterface([Function responseFactory]) =>
+      responseFactory(null);
 
-  dynamic getTypeDefinition(String typeKey, [Function responseFactory]) => null;
+  dynamic getTypeDefinition(String typeKey, [Function responseFactory]) =>
+      responseFactory(null);
 
-  dynamic getAllTypeDefinitions([Function responseFactory]) => null;
+  dynamic getAllTypeDefinitions([Function responseFactory]) =>
+      responseFactory(null);
 }
 
 abstract class ViewAssociate {
@@ -744,19 +747,27 @@ class ViewAssociateStub extends bindings.Stub {
 
   int get version => 0;
 
-  service_describer.ServiceDescription get serviceDescription =>
-    new _ViewAssociateServiceDescription();
+  static service_describer.ServiceDescription _cachedServiceDescription;
+  static service_describer.ServiceDescription get serviceDescription {
+    if (_cachedServiceDescription == null) {
+      _cachedServiceDescription = new _ViewAssociateServiceDescription();
+    }
+    return _cachedServiceDescription;
+  }
 }
 
 
 
 
 class _ViewInspectorServiceDescription implements service_describer.ServiceDescription {
-  dynamic getTopLevelInterface([Function responseFactory]) => null;
+  dynamic getTopLevelInterface([Function responseFactory]) =>
+      responseFactory(null);
 
-  dynamic getTypeDefinition(String typeKey, [Function responseFactory]) => null;
+  dynamic getTypeDefinition(String typeKey, [Function responseFactory]) =>
+      responseFactory(null);
 
-  dynamic getAllTypeDefinitions([Function responseFactory]) => null;
+  dynamic getAllTypeDefinitions([Function responseFactory]) =>
+      responseFactory(null);
 }
 
 abstract class ViewInspector {
@@ -912,8 +923,13 @@ class ViewInspectorStub extends bindings.Stub {
 
   int get version => 0;
 
-  service_describer.ServiceDescription get serviceDescription =>
-    new _ViewInspectorServiceDescription();
+  static service_describer.ServiceDescription _cachedServiceDescription;
+  static service_describer.ServiceDescription get serviceDescription {
+    if (_cachedServiceDescription == null) {
+      _cachedServiceDescription = new _ViewInspectorServiceDescription();
+    }
+    return _cachedServiceDescription;
+  }
 }