Move invokeOn to InstanceMirror.

dart/runtime/lib/invocation_mirror_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.
 
 class _InvocationMirror implements Invocation {
   // Constants describing the invocation type.
   // _FIELD cannot be generated by regular invocation mirrors.
   static const int _METHOD = 0;
   static const int _GETTER = 1;
   static const int _SETTER = 2;
@@ skipping 108 matching lines @@
                                    List arguments) {
     return new _InvocationMirror(functionName, argumentsDescriptor, arguments);
   }
 
   static _invoke(Object receiver,
                  String functionName,
                  List argumentsDescriptor,
                  List arguments)
       native "InvocationMirror_invoke";
 
-  invokeOn(Object receiver) {
+  _invokeOn(Object receiver) {
     return _invoke(receiver, _functionName, _argumentsDescriptor, _arguments);
   }
+
+  // TODO(ahe): This is a hack.  See _LocalInstanceMirrorImpl.delegate
+  // in mirrors_impl.dart
+  static final _invokeOnClosure = (x, y) => y._invokeOn(x);
 }
-