VM: Support calling through getters in InstanceMirror.delegate. Implement without accessing private…

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 115 matching lines @@
 
   static _allocateInvocationMirror(String functionName,
                                    List argumentsDescriptor,
                                    List arguments,
                                    bool isSuperInvocation) {
     return new _InvocationMirror(functionName,
                                  argumentsDescriptor,
                                  arguments,
                                  isSuperInvocation);
   }
-
-  static _invoke(Object receiver,
-                 String functionName,
-                 List argumentsDescriptor,
-                 List arguments)
-      native "InvocationMirror_invoke";
-
-  _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);
 }