[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-behaviors/test/test-elements.html

 <!--
 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="../iron-control-state.html">
 <link rel="import" href="../iron-button-state.html">
 
 <script>
 
   Polymer({
 
     is: 'test-control',
 
     behaviors: [
@@ skipping 37 matching lines @@
 
     is: 'nested-focusable',
 
     behaviors: [
       Polymer.IronControlState
     ]
 
   });
 
 </script>
+
+<dom-module id="test-light-dom">
+
+  <template>
+    <content select="*"></content>
+  </template>
+
+</dom-module>
+
+<script>
+
+  Polymer({
+
+    is: 'test-light-dom',
+
+    behaviors: [
+      Polymer.IronControlState,
+      Polymer.IronButtonState
+    ]
+
+  });
+
+</script>