Update polymer 1.0 install to pick up newly added elements.

polymer_1.0.4/bower_components/iron-dropdown/demo/x-select.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="../iron-dropdown.html">
+<link rel="import" href="../../neon-animation/neon-animations.html">
+<link rel="import" href="grow-height-animation.html">
+
+<dom-module id="x-select">
+  <style>
+    :host {
+      display: inline-block;
+      margin: 1em;
+    }
+  </style>
+  <template>
+    <div on-tap="open">
+      <content select=".dropdown-trigger"></content>
+    </div>
+    <iron-dropdown id="dropdown"
+      vertical-align="[[verticalAlign]]"
+      horizontal-align="[[horizontalAlign]]"
+      disabled="[[disabled]]"
+      open-animation-config="[[openAnimationConfig]]"
+      close-animation-config="[[closeAnimationConfig]]">
+      <content select=".dropdown-content"></content>
+    </iron-dropdown>
+  </template>
+  <script>
+    Polymer({
+      is: 'x-select',
+
+      properties: {
+        verticalAlign: String,
+        horizontalAlign: String,
+        disabled: Boolean,
+        openAnimationConfig: {
+          type: Array,
+          value: function() {
+            return [{
+              name: 'fade-in-animation',
+              timing: {
+                delay: 150,
+                duration: 50
+              }
+            }, {
+              name: 'expand-animation',
+              timing: {
+                delay: 150,
+                duration: 200
+              }
+            }];
+          }
+        },
+
+        closeAnimationConfig: {
+          type: Array,
+          value: function() {
+            return [{
+              name: 'fade-out-animation',
+              timing: {
+                duration: 200
+              }
+            }];
+          }
+        }
+      },
+
+      open: function() {
+        this.$.dropdown.open();
+      }
+    });
+  </script>
+</dom-module>