Fix merging issue in new emitter.

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 '../../dart_types.dart' show DartType;
 import '../../js/js.dart' as js;
 import '../../js_backend/js_backend.dart' show
@@ skipping 499 matching lines @@
       proto[descriptor[pos]] = stub;
       funs.push(stub);
     }
     if (descriptor[2] != null) {
       var isIntercepted = descriptor[3];
       var reflectionInfo = descriptor[4];
       proto[descriptor[2]] = 
           tearOff(funs, reflectionInfo, false, name, isIntercepted);
     }
     // Install the alias for super calls on the prototype chain.
-    if (desc[5] != null) {
-      proto[desc[5]] = desc[0];
+    if (descriptor[5] != null) {
+      proto[descriptor[5]] = descriptor[0];
     }
   } else {
     proto[name] = descriptor;
   }
 }
 """;
 
   js.Expression _generateFunctionType(DartType memberType) {
     if (memberType.containsTypeVariables) {
       js.Expression thisAccess = js.js(r'this.$receiver');
@@ skipping 355 matching lines @@
 
   var end = Date.now();
   print('Setup: ' + (end - start) + ' ms.');
 
   #main();  // Start main.
 
 }(Date.now(), #code)
 }""";
 
 }