Resubmit fix for Function::Clone() and Field::Clone() to adjust the class owner

tests/language/mixin_type_parameter5_test.dart

Index: tests/language/mixin_type_parameter5_test.dart
===================================================================
--- tests/language/mixin_type_parameter5_test.dart	(revision 0)
+++ tests/language/mixin_type_parameter5_test.dart	(working copy)
@@ -0,0 +1,26 @@
+// Copyright (c) 2014, 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 MixinA<T> {
+  T intField;
+}
+
+class MixinB<S> {
+  S stringField;
+}
+
+class MixinC<U, V> {
+  U listField;
+  V mapField;
+}
+
+class C extends Object with MixinA<int>, MixinB<String>, MixinC<List, Map> {}
+
+void main() {
+  var c = new C();
+  c.intField = 0;
+  c.stringField = '';
+  c.listField = [];
+  c.mapField = {};
+}