dart2js: store call stubs in the model.

pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.dart
index e7749269a58de6e35c97276a82fe6fe3067d354d..71eea42d494f1570968421d2ca7a40f167ec4869 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.dart
@@ -43,6 +43,7 @@ class ClassEmitter extends CodeEmitterHelper {
     emitCheckedClassSetters(cls, builder);
     emitClassGettersSettersForCSP(cls, builder);
     emitInstanceMembers(classElement, builder, onlyForRti: onlyForRti);
+    emitCallStubs(cls, builder);
     emitRuntimeTypeInformation(cls, builder);
     if (additionalProperties != null) {
       additionalProperties.forEach(builder.addProperty);
@@ -218,6 +219,13 @@ class ClassEmitter extends CodeEmitterHelper {
     }
   }
 
+  void emitCallStubs(Class cls, ClassBuilder builder) {
+    for (Method method in cls.callStubs) {
+      jsAst.Property property = builder.addProperty(method.name, method.code);
+      compiler.dumpInfoTask.registerElementAst(method.element, property);
+    }
+  }
+
   /**
    * Documentation wanted -- johnniwinther
    *