Update polymer 1.0 install to pick up newly added elements.

polymer_1.0.4/bower_components/iron-list/test/helpers.html

+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE
+The complete set of authors may be found at http://polymer.github.io/AUTHORS
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS
+-->
+
+<script>
+  function findElementInList(container, selector) {
+    var i = 0;
+    var children = container._children;
+    var ms = Polymer.DomApi.matchesSelector;
+    for (; i < children.length; i++) {
+      if (children[i].nodeType === Node.ELEMENT_NODE && ms.call(children[i], selector)) {
+        return children[i];
+      }
+    }
+    return null;
+  }
+
+  function buildItem(index) {
+    return {
+      index: index
+    };
+  }
+
+  function buildDataSet(size) {
+    var data = [];
+    while (data.length < size) {
+      data.push(buildItem(data.length));
+    }
+    return data;
+  }
+
+  function simulateScroll(config, fn) {
+    var list = config.list;
+    var target = config.target;
+    var delay = config.delay || 1;
+    var contribution = config.contribution || 10;
+
+    function scroll(dir, prevVal) {
+      list.scrollTop = list.scrollTop + dir;
+      if (list.scrollTop !== target && prevVal !== list.scrollTop) {
+        setTimeout(scroll.bind(null, dir, list.scrollTop), delay);
+      } else {
+        setTimeout(fn.bind(null, list.scrollTop), 100);
+      }
+    }
+
+    if (list.scrollTop < target) {
+      scroll(Math.abs(contribution), -1);
+    } else if (list.scrollTop > target) {
+      scroll(-Math.abs(contribution), -1);
+    }
+  }
+
+  function getFirstItemFromList(list) {
+    var listRect = list.getBoundingClientRect();
+    return document.elementFromPoint(listRect.left + 1, listRect.top + 1);
+  }
+
+  function getLastItemFromList(list) {
+    var listRect = list.getBoundingClientRect();
+    return document.elementFromPoint(listRect.left + 1, listRect.top + listRect.height - 1);
+  }
+</script>