update elements and fix some bugs

test/paper_radio_button_behavior_test.dart

+// Copyright (c) 2015, 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.
+@TestOn('browser')
+library polymer_elements.test.paper_radio_button_behavior_test;
+
+import 'package:test/test.dart';
+import 'package:polymer_elements/iron_a11y_keys_behavior.dart';
+import 'package:polymer_elements/iron_checked_element_behavior.dart';
+import 'package:polymer_elements/iron_button_state.dart';
+import 'package:polymer_elements/iron_control_state.dart';
+import 'package:polymer_elements/iron_form_element_behavior.dart';
+import 'package:polymer_elements/iron_validatable_behavior.dart';
+import 'package:polymer_elements/paper_checked_element_behavior.dart';
+import 'package:polymer_elements/paper_inky_focus_behavior.dart';
+import 'package:polymer_elements/paper_ripple_behavior.dart';
+import 'package:polymer/polymer.dart';
+import 'common.dart';
+
+main() async {
+  await initPolymer();
+  
+  group('basic', () {
+    TestRadioButton button;
+
+    setUp(() {
+      button = fixture('basic');
+      blur(button);
+    });
+
+    test('normal (no states)', () {
+      expect(button.focused, isFalse);
+      expect(button.hasRipple(), isFalse);
+    });
+
+    test('receives focus', () {
+      focus(button);
+
+      expect(button.focused, isTrue);
+      expect(button.hasRipple(), isTrue);
+    });
+
+  });
+}
+
+@PolymerRegister('test-radio-button')
+class TestRadioButton extends PolymerElement
+    with
+        IronA11yKeysBehavior,
+        IronButtonState,
+        IronControlState,
+        PaperRippleBehavior,
+        PaperInkyFocusBehavior,
+        IronFormElementBehavior,
+        IronValidatableBehavior,
+        IronCheckedElementBehavior,
+        PaperCheckedElementBehavior {
+  TestRadioButton.created() : super.created();
+}