Change memberName and namedArguments in Invocation to use Symbol.

dart/runtime/lib/object_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 class Object {
 
   // Helpers used to implement hashCode. If a hashCode is used we remember it
   // using an Expando object. A new hashCode value is calculated using a Random
   // number generator.
   static Expando _hashCodeExp = new Expando("Object.hashCode");
@@ skipping 17 matching lines @@
 
   _noSuchMethod(bool isMethod,
                 String memberName,
                 int type,
                 List arguments,
                 Map<String, dynamic> namedArguments)
       native "Object_noSuchMethod";
 
   /* patch */ noSuchMethod(Invocation invocation) {
     return _noSuchMethod(invocation.isMethod,
-                         invocation.memberName,
+                         _collection_dev.Symbol.getName(invocation.memberName),
                          invocation._type,
                          invocation.positionalArguments,
-                         invocation.namedArguments);
+                         _symbolMapToStringMap(invocation.namedArguments));
   }
 
   /* patch */ Type get runtimeType native "Object_runtimeType";
 
   // Call this function instead of inlining instanceof, thus collecting
   // type feedback and reducing code size of unoptimized code.
   bool _instanceOf(instantiator,
                    instantiator_type_arguments,
                    type,
                    bool negate)
       native "Object_instanceOf";
 
   // Call this function instead of inlining 'as', thus collecting type
   // feedback. Returns receiver.
   _as(instantiator, instantiator_type_arguments, type) native "Object_as";
+
+  static _symbolMapToStringMap(Map<Symbol, dynamic> map) {
+    var result = new Map<String, dynamic>();
+    map.forEach((Symbol key, value) {
+      result[_collection_dev.Symbol.getName(key)] = value;
+    });
+    return result;
+  }
 }