Serialize scopes according to semantic structure.

dart/tests/try/poi/data/subclass.dart

+// 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.
+
+library subclass;
+
+import 'interesting.dart';
+
+import 'private.dart' as p;
+
+class S extends p.P {
+  superMethod1() {
+  }
+  superMethod2() {
+  }
+  static staticSuperMethod1() {
+  }
+  static staticSuperMethod2() {
+  }
+}
+
+class C extends S {
+  instanceMethod1() {
+  }
+  instanceMethod2() {
+  }
+  static staticMethod1() {
+  }
+  static staticMethod2() {
+  }
+}
+
+main() {}