update elements and fix some bugs

test/paper_ripple_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_ripple_behavior_test;
+
+import 'package:test/test.dart';
+import 'package:polymer_elements/iron_a11y_keys_behavior.dart';
+import 'package:polymer_elements/iron_button_state.dart';
+import 'package:polymer_elements/iron_control_state.dart';
+import 'package:polymer_elements/paper_ripple_behavior.dart';
+import 'package:polymer/polymer.dart';
+import 'common.dart';
+
+main() async {
+  await initPolymer();
+  
+  group('PaperRippleBehavior', () {
+    var ripple;
+
+    setUp(() {
+      ripple = fixture('basic');
+    });
+
+    test('no ripple at startup', () {
+      expect(ripple.hasRipple(), isFalse);
+    });
+
+    test('calling getRipple returns ripple', () {
+      expect(ripple.getRipple(), isNotNull);
+    });
+
+    test('focus generates ripple', () {
+      focus(ripple);
+      expect(ripple.hasRipple(), isTrue);
+    });
+
+    test('down generates ripple', () {
+      down(ripple);
+      expect(ripple.hasRipple(), isTrue);
+      up(ripple);
+    });
+
+  });
+}
+
+@PolymerRegister('test-ripple')
+class TestRipple extends PolymerElement
+    with
+      IronA11yKeysBehavior,
+      IronButtonState,
+      IronControlState,
+      PaperRippleBehavior {
+  TestRipple.created() : super.created();
+}