Transitively include outlines of all public members of Class(es).

pkg/front_end/testcases/shaker/transitive_superclass_lib.dart

Index: pkg/front_end/testcases/shaker/transitive_superclass_lib.dart
diff --git a/pkg/front_end/testcases/shaker/transitive_superclass_lib.dart b/pkg/front_end/testcases/shaker/transitive_superclass_lib.dart
index c89598bc1729a6473c7087db2666b49faeec432e..6b301b6266d5c2ca45c854940e0e490813edeed2 100644
--- a/pkg/front_end/testcases/shaker/transitive_superclass_lib.dart
+++ b/pkg/front_end/testcases/shaker/transitive_superclass_lib.dart
@@ -2,8 +2,14 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
-class _A {}
+class _A {
+  int field;
+}
 
-class B extends _A {}
+class B extends _A {
+  int field;
+}
 
-class C extends B {}
+class C extends B {
+  int field;
+}