Accept instance members and locals named "Function" (fixes #28610).

tests/language/regress_28610_test.dart

Index: tests/language/regress_28610_test.dart
diff --git a/tests/language/regress_28610_test.dart b/tests/language/regress_28610_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..adefd32dcbbfc56cc3d015bdefd699449a37f80b
--- /dev/null
+++ b/tests/language/regress_28610_test.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2017, 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.
+
+import "package:expect/expect.dart";
+
+class A {
+  final int Function = 0;
+}
+
+main() {
+  final int Function = 0;
+  Expect.equals(Function, new A().Function);
+}