fix #552, Object members on native types

tool/input_sdk/patch/core_patch.dart

 // Copyright (c) 2012, 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.
 
 // Patch file for dart:core classes.
 import "dart:_internal" as _symbol_dev;
 import 'dart:_interceptors';
 import 'dart:_js_helper' show patch,
                               checkInt,
                               getRuntimeType,
@@ skipping 26 matching lines @@
   @patch
   dynamic noSuchMethod(Invocation invocation) {
     throw new NoSuchMethodError(
         this,
         invocation.memberName,
         invocation.positionalArguments,
         invocation.namedArguments);
   }
 
   @patch
-  Type get runtimeType => JS('Type', 'dart.objectRuntimeType(#)', this);
+  Type get runtimeType =>
+      JS('Type', 'dart.wrapType(dart.getReifiedType(#))', this);
 }
 
 // Patch for Function implementation.
 @patch
 class Function {
   @patch
   static apply(Function f,
                List positionalArguments,
                [Map<Symbol, dynamic> namedArguments]) {
     // TODO(vsm): Handle named args.
@@ skipping 511 matching lines @@
       return getTraceFromException(error);
     }
     // Fallback if Error.captureStackTrace does not exist.
     try {
       throw '';
     } catch (_, stackTrace) {
       return stackTrace;
     }
   }
 }