Expose Service Describer in Dart mojo package

mojo/dart/packages/mojo_services/lib/tracing/tracing.mojom.dart

 // Copyright 2014 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.
 
 library tracing_mojom;
 
 import 'dart:async';
 
 import 'package:mojo/bindings.dart' as bindings;
 import 'package:mojo/core.dart' as core;
@@ skipping 367 matching lines @@
 
 
 
 
 const int _TraceProvider_startTracingName = 0;
 const int _TraceProvider_stopTracingName = 1;
 
 
 
 class _TraceProviderServiceDescription 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 TraceProvider {
   static const String serviceName = "tracing::TraceProvider";
   void startTracing(String categories, Object recorder);
   void stopTracing();
 }
 
 
 class _TraceProviderProxyImpl extends bindings.Proxy {
@@ skipping 165 matching lines @@
     _impl = d;
   }
 
   String toString() {
     var superString = super.toString();
     return "TraceProviderStub($superString)";
   }
 
   int get version => 0;
 
-  service_describer.ServiceDescription get serviceDescription =>
-    new _TraceProviderServiceDescription();
+  static service_describer.ServiceDescription _cachedServiceDescription;
+  static service_describer.ServiceDescription get serviceDescription {
+    if (_cachedServiceDescription == null) {
+      _cachedServiceDescription = new _TraceProviderServiceDescription();
+    }
+    return _cachedServiceDescription;
+  }
 }
 
 const int _TraceRecorder_recordName = 0;
 
 
 
 class _TraceRecorderServiceDescription 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 TraceRecorder {
   static const String serviceName = null;
   void record(String json);
 }
 
 
 class _TraceRecorderProxyImpl extends bindings.Proxy {
   _TraceRecorderProxyImpl.fromEndpoint(
@@ skipping 150 matching lines @@
     _impl = d;
   }
 
   String toString() {
     var superString = super.toString();
     return "TraceRecorderStub($superString)";
   }
 
   int get version => 0;
 
-  service_describer.ServiceDescription get serviceDescription =>
-    new _TraceRecorderServiceDescription();
+  static service_describer.ServiceDescription _cachedServiceDescription;
+  static service_describer.ServiceDescription get serviceDescription {
+    if (_cachedServiceDescription == null) {
+      _cachedServiceDescription = new _TraceRecorderServiceDescription();
+    }
+    return _cachedServiceDescription;
+  }
 }
 
 const int _TraceCollector_startName = 0;
 const int _TraceCollector_stopAndFlushName = 1;
 
 
 
 class _TraceCollectorServiceDescription 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 TraceCollector {
   static const String serviceName = "tracing::TraceCollector";
   void start(core.MojoDataPipeProducer stream, String categories);
   void stopAndFlush();
 }
 
 
 class _TraceCollectorProxyImpl extends bindings.Proxy {
@@ skipping 165 matching lines @@
     _impl = d;
   }
 
   String toString() {
     var superString = super.toString();
     return "TraceCollectorStub($superString)";
   }
 
   int get version => 0;
 
-  service_describer.ServiceDescription get serviceDescription =>
-    new _TraceCollectorServiceDescription();
+  static service_describer.ServiceDescription _cachedServiceDescription;
+  static service_describer.ServiceDescription get serviceDescription {
+    if (_cachedServiceDescription == null) {
+      _cachedServiceDescription = new _TraceCollectorServiceDescription();
+    }
+    return _cachedServiceDescription;
+  }
 }