implement user-defined nSM, Object members on functions

tool/input_sdk/private/ddc_runtime/rtti.dart

 // Copyright (c) 2015, 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.
 
 /// This library defines the association between runtime objects and
 /// runtime types.
 part of dart._runtime;
 
 /// Runtime type information.  This module defines the mapping from
 /// runtime objects to their runtime type information.  See the types
@@ skipping 143 matching lines @@
 wrapType(type) {
   // If we've already wrapped this type once, use the previous wrapper. This
   // way, multiple references to the same type return an identical Type.
   if (JS('bool', '#.hasOwnProperty(#)', type, _typeObject)) {
     return JS('', '#[#]', type, _typeObject);
   }
   return JS('', '#[#] = new #(#)', type, _typeObject, WrappedType, type);
 }
 
 /// Given a WrappedType, return the internal runtime type object.
-unwrapType(obj) => obj._runtimeType;
+unwrapType(obj) => obj._wrappedType;
 
 _getRuntimeType(value) => JS('', '#[#]', value, _runtimeType);
 
 /// Tag the runtime type of [value] to be type [t].
 void tag(value, t) {
   JS('', '#[#] = #', value, _runtimeType, t);
 }
 
 void tagComputed(value, compute) {
   JS('', '#(#, #, { get: # })', defineProperty, value, _runtimeType, compute);
 }
 
 void tagLazy(value, compute) {
   JS('', '#(#, #, { get: # })',
       defineLazyProperty, value, _runtimeType, compute);
 }