cleans up sdk patching so we no longer have unresolved names

test/generated_sdk/lib/_internal/compiler/js_lib/isolate_serialization.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.
 
 part of _isolate_helper;
 
 /// Serialize [message].
 _serializeMessage(message) {
   return new _Serializer().serialize(message);
 }
@@ skipping 341 matching lines @@
     var instanceFromClassId = JS_EMBEDDED_GLOBAL('', INSTANCE_FROM_CLASS_ID);
     var initializeObject = JS_EMBEDDED_GLOBAL('', INITIALIZE_EMPTY_INSTANCE);
 
     var emptyInstance = JS('', '#(#)', instanceFromClassId, classId);
     deserializedObjects.add(emptyInstance);
     deserializeArrayInPlace(fields);
     return JS('', '#(#, #, #)',
               initializeObject, classId, emptyInstance, fields);
   }
 }