Update polymer 1.0 install to pick up newly added elements.

polymer_1.0.4/bower_components/iron-dropdown/demo/grow-height-animation.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.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 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.txt
 -->
 
 <link rel="import" href="../../polymer/polymer.html">
-<link rel="import" href="../neon-animation-behavior.html">
-<link rel="import" href="../web-animations.html">
-
-<!--
-`<fade-in-animation>` animates the opacity of an element from 0 to 1.
-
-Configuration:
-```
-{
-  name: 'fade-in-animation',
-  node: <node>
-  timing: <animation-timing>
-}
-```
--->
+<link rel="import" href="../../neon-animation/neon-animation-behavior.html">
 
 <script>
-
   Polymer({
-
-    is: 'fade-in-animation',
+    is: 'expand-animation',
 
     behaviors: [
       Polymer.NeonAnimationBehavior
     ],
 
     configure: function(config) {
       var node = config.node;
-      this._effect = new KeyframeEffect(node, [
-        {'opacity': '0'},
-        {'opacity': '1'}
-      ], this.timingFromConfig(config));
+
+      var height = node.getBoundingClientRect().height;
+
+      this._effect = new KeyframeEffect(node, [{
+        height: (height / 2) + 'px'
+      }, {
+        height: height + 'px'
+      }], this.timingFromConfig(config));
+
       return this._effect;
     }
-
   });
-
 </script>