update elements and fix some bugs

test/iron_behavior_active_state_test.dart

 @TestOn('browser')
 library polymer_elements.test.iron_behavior_active_state_test;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:html';
 import 'dart:js';
 import 'package:polymer_interop/polymer_interop.dart';
 import 'package:polymer/polymer.dart';
 import 'package:test/test.dart';
 import 'package:web_components/web_components.dart';
 import 'fixtures/iron_behavior_elements.dart';
 import 'common.dart';
 
 main() async {
   await initPolymer();
 
   group('active-state', () {
     TestButton activeTarget;
 
     setUp(() {
       activeTarget = fixture('TrivialActiveState');
     });
 
-    group('non-primary pointer input source', () {
-      test('does not cause state to change', () {
-        var rightClickMouseEvent = new CustomEvent('mousedown');
-        new JsObject.fromBrowserObject(rightClickMouseEvent)['buttons'] = 2;
-        activeTarget.dispatchEvent(rightClickMouseEvent);
-        expect(activeTarget.pressed, false);
-      });
-    });
-
     group('active state with toggles attribute', () {
       setUp(() {
         activeTarget = fixture('ToggleActiveState');
       });
+      
+      group('when down', () {
+        test('is pressed', () {
+          down(activeTarget);
+          expect(activeTarget.getAttribute('pressed'), isNotNull);
+        });
+      });
 
       group('when clicked', () {
         test('is activated', () {
           var done = new Completer();
           downAndUp(activeTarget, () {
             try {
               expect(activeTarget.getAttribute('active'), isNotNull);
               expect(activeTarget.getAttribute('aria-pressed'), isNotNull);
               expect(activeTarget.getAttribute('aria-pressed'), 'true');
               done.complete();
@@ skipping 138 matching lines @@
             done.complete(e);
           }
         });
 
         pressEnter(activeTarget);
         return done.future;
       });
     });
   });
 }