update elements and fix some bugs

lib/src/iron-list/test/hidden-list.html

Index: lib/src/iron-list/test/hidden-list.html
diff --git a/lib/src/iron-list/test/hidden-list.html b/lib/src/iron-list/test/hidden-list.html
index fa1a64531c8c2a6054e3e879afa55ed9219cac7b..e6b45ddd39b90f331f3d796ba59465e603ea757d 100644
--- a/lib/src/iron-list/test/hidden-list.html
+++ b/lib/src/iron-list/test/hidden-list.html
@@ -51,15 +51,15 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
         });
       });
 
-      test('resize', function(done) {
+      test('iron-resize', function(done) {
         list.items = buildDataSet(100);
-        list.fire('resize');
+        list.fire('iron-resize');
        
         assert.notEqual(getFirstItemFromList(list).textContent, '0');
         Polymer.RenderStatus.whenReady(function() {
           container.removeAttribute('hidden');
           assert.notEqual(getFirstItemFromList(list).textContent, '0');
-          list.fire('resize');
+          list.fire('iron-resize');
           flush(function() {
             assert.isTrue(list.isAttached);
             assert.equal(getFirstItemFromList(list).textContent, '0');