[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-selector/iron-selection.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
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@@ skipping 14 matching lines @@
 
     /**
      * Retrieves the selected item(s).
      *
      * @method get
      * @returns Returns the selected item(s). If the multi property is true,
      * `get` will return an array, otherwise it will return
      * the selected item or undefined if there is no selection.
      */
     get: function() {
-      return this.multi ? this.selection : this.selection[0];
+      return this.multi ? this.selection.slice() : this.selection[0];
     },
 
     /**
      * Clears all the selection except the ones indicated.
      *
      * @method clear
      * @param {Array} excludes items to be excluded.
      */
     clear: function(excludes) {
       this.selection.slice().forEach(function(item) {
@@ skipping 60 matching lines @@
      * @method toggle
      * @param {*} item The item to toggle.
      */
     toggle: function(item) {
       this.setItemSelected(item, !this.isSelected(item));
     }
 
   };
 
 </script>