Inherit @published from base class (fix issue 13937)

pkg/polymer/test/publish_inherited_properties_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.
 
 import 'dart:html';
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'package:polymer/polymer.dart';
 
 // Dart note: unlike JS, you can't publish something that doesn't
 // have a corresponding field because we can't dynamically add properties.
 // So we define XFoo and XBar types here.
-@CustomTag('x-foo')
 class XFoo extends PolymerElement {
   XFoo.created() : super.created();
 
-  @observable var Foo;
-  @observable var baz;
+  @published var Foo;
 }
 
-@CustomTag('x-bar')
 class XBar extends XFoo {
   XBar.created() : super.created();
 
-  @observable var Bar;
+  @published var Bar;
 }
 
 @CustomTag('x-zot')
 class XZot extends XBar {
   XZot.created() : super.created();
 
   @published int zot = 3;
 }
 
+class XWho extends XZot {
+  XWho.created() : super.created();
+
+  @published var zap;
+}
+
 @CustomTag('x-squid')
-class XSquid extends XZot {
+class XSquid extends XWho {
   XSquid.created() : super.created();
 
   @published int baz = 13;
   @published int zot = 5;
   @published int squid = 7;
 }
 
 main() {
   initPolymer();
   useHtmlConfiguration();
 
   setUp(() => Polymer.onReady);
 
   test('published properties', () {
     published(tag) =>
         query('polymer-element[name=$tag]').publishedProperties;
 
-    expect(published('x-foo'), [#Foo, #baz]);
-    expect(published('x-bar'), [#Foo, #baz, #Bar]);
-    expect(published('x-zot'), [#Foo, #baz, #Bar, #zot]);
-    expect(published('x-squid'), [#Foo, #baz, #Bar, #zot, #squid]);
+    expect(published('x-zot'), [#Foo, #Bar, #zot]);
+    expect(published('x-squid'), [#Foo, #Bar, #zot, #zap, #baz, #squid]);
   });
 }