Ensure only a subset of elements enter in Compiler.analyzedElement.

tests/language/issue13556_test.dart

Index: tests/language/issue13556_test.dart
===================================================================
--- tests/language/issue13556_test.dart	(revision 0)
+++ tests/language/issue13556_test.dart	(revision 0)
@@ -0,0 +1,19 @@
+// 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 dart2js that used to crash when resolving the
+// @B() annotation.
+
+class A {
+  final a;
+  const A({this.a});
+}
+
+class B extends A {
+  const B();
+}
+
+@B()
+main() {
+}