Roll polymer packages to version 0.3.4

pkg/polymer/test/unbind_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.
 
 library polymer.test.unbind_test;
 
 import 'dart:async' show Future, scheduleMicrotask;
 import 'dart:html';
 
 @MirrorsUsed(targets: const [Polymer], override: 'polymer.test.unbind_test')
@@ skipping 46 matching lines @@
   });
 }
 
 // TODO(sorvell): In IE, the unbind time is indeterminate, so wait an
 // extra beat.
 delay(x) => new Future.delayed(new Duration(milliseconds: 50), () => x);
 
 // TODO(jmesserly): fix this when it's easier to get a private symbol.
 final unboundSymbol = reflectClass(Polymer).declarations.keys
     .firstWhere((s) => MirrorSystem.getName(s) == '_unbound');
+final observersSymbol = reflectClass(Polymer).declarations.keys
+    .firstWhere((s) => MirrorSystem.getName(s) == '_observers');
 
 _unbound(node) => reflect(node).getField(unboundSymbol).reflectee;
+_observerCount(node) =>
+    reflect(node).getField(observersSymbol).reflectee.length;
 
 unbindTests() {
   var xTest = document.querySelector('x-test');
   xTest.foo = 'bar';
   scheduleMicrotask(Observable.dirtyCheck);
 
   return delay(null).then((_) {
     expect(_unbound(xTest), null, reason:
         'element is bound when inserted');
     expect(xTest.fooWasChanged, true, reason:
         'element is actually bound');
+    // Dart note: we don't have a way to check for the global count of
+    // observables/bindables, so we just check the count in the node.
+    expect(_observerCount(xTest), greaterThan(0));
     xTest.remove();
   }).then(delay).then((_) {
     expect(_unbound(xTest), true, reason:
         'element is unbound when removed');
+    expect(_observerCount(xTest), 0);
     return new XTest();
   }).then(delay).then((node) {
     expect(_unbound(node), null, reason:
         'element is bound when not inserted');
     node.foo = 'bar';
+    expect(_observerCount(node), greaterThan(0));
     scheduleMicrotask(Observable.dirtyCheck);
     return node;
   }).then(delay).then((node) {
     expect(node.fooWasChanged, true, reason: 'node is actually bound');
+    node.unbindAll();
     var n = new XTest();
     n.cancelUnbindAll();
     return n;
   }).then(delay).then((node) {
     expect(_unbound(node), null, reason:
         'element is bound when cancelUnbindAll is called');
+    expect(_observerCount(node), greaterThan(0));
     node.unbindAll();
     expect(_unbound(node), true, reason:
         'element is unbound when unbindAll is called');
+    expect(_observerCount(node), 0);
     var n = new XTest()..id = 'foobar!!!';
     document.body.append(n);
     return n;
   }).then(delay).then((node) {
     expect(_unbound(node), null, reason:
         'element is bound when manually inserted');
+    expect(_observerCount(node), greaterThan(0));
     node.remove();
     return node;
   }).then(delay).then((node) {
     expect(_unbound(node), true, reason:
         'element is unbound when manually removed is called');
+    expect(_observerCount(node), 0);
   });
 }