dart2js: Add elements to the emitter's model.

pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.new_js_emitter.model_emitter;
 
 import '../../dart2jslib.dart' show Compiler;
 import '../../js/js.dart' as js;
 import '../../js_backend/js_backend.dart' show
     JavaScriptBackend,
@@ skipping 283 matching lines @@
         case 1: return "function() { return this[#]; }";
         case 2: return "function(receiver) { return receiver[#]; }";
         case 3: return "function(receiver) { return this[#]; }";
       }
       return null;
     }
 
     js.Expression fieldName = js.string(field.name);
     js.Expression code = js.js(getterTemplateFor(field.getterFlags), fieldName);
     String getterName = "${namer.getterPrefix}${field.name}";
-    return new Method(getterName, code);
+    return new StubMethod(getterName, code);
   }
 
   Method _generateSetter(InstanceField field) {
     String setterTemplateFor(int flags) {
       switch (flags) {
         case 1: return "function(val) { return this[#] = val; }";
         case 2: return "function(receiver, val) { return receiver[#] = val; }";
         case 3: return "function(receiver, val) { return this[#] = val; }";
       }
       return null;
     }
     js.Expression fieldName = js.string(field.name);
     js.Expression code = js.js(setterTemplateFor(field.setterFlags), fieldName);
     String setterName = "${namer.setterPrefix}${field.name}";
-    return new Method(setterName, code);
+    return new StubMethod(setterName, code);
   }
 
   Iterable<Method> _generateGettersSetters(Class cls) {
     Iterable<Method> getters = cls.fields
         .where((InstanceField field) => field.needsGetter)
         .map(_generateGetter);
 
     Iterable<Method> setters = cls.fields
         .where((InstanceField field) => field.needsSetter)
         .map(_generateSetter);
@@ skipping 216 matching lines @@
 
   var end = Date.now();
   print('Setup: ' + (end - start) + ' ms.');
 
   #main();  // Start main.
 
 }(Date.now(), #code)
 }""";
 
 }