Fix crash evaluating metadata with super in a const constructor argument.

tests/lib/mirrors/metadata_constructor_arguments_test.dart

 // Copyright (c) 2013, 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.
 
 // Regression test for Issue 13817.
 
 library test.metadata_constructor_arguments;
 
 import 'dart:mirrors';
 import 'package:expect/expect.dart';
@@ skipping 27 matching lines @@
 @Tag(named: F.nonConstStaticField)  /// 04: compile-time error
 class F {
   static var nonConstStaticField = 6;
 }
 
 @Tag(named: instanceMethod)  /// 05: compile-time error
 class G {
   instanceMethod() {}
 }
 
+@Tag(named: this)  /// 06: compile-time error
+class H {
+  instanceMethod() {}
+}
+
+@Tag(named: super)  /// 07: compile-time error
+class I {
+  instanceMethod() {}
+}
+
 checkMetadata(DeclarationMirror mirror, List expectedMetadata) {
   Expect.listEquals(expectedMetadata.map(reflect).toList(), mirror.metadata);
 }
 
 main() {
   reflectClass(A).metadata;
   checkMetadata(reflectClass(B), [const Tag(named: 'valid')]);
   checkMetadata(reflectClass(C), [const Tag(named: C.STATIC_FIELD)]);
   reflectClass(D).metadata;
   reflectClass(E).metadata;
   reflectClass(F).metadata;
   reflectClass(G).metadata;
+  reflectClass(H).metadata;
+  reflectClass(I).metadata;
 }