[Polymer] update third_party polymer

third_party/polymer/v1_0/components-chromium/neon-animation/neon-animated-pages-extracted.js

 (function() {
 
   Polymer({
 
     is: 'neon-animated-pages',
 
     behaviors: [
       Polymer.IronResizableBehavior,
       Polymer.IronSelectableBehavior,
       Polymer.NeonAnimationRunnerBehavior
     ],
 
     properties: {
 
       activateEvent: {
         type: String,
         value: ''
       },
 
       // if true, the initial page selection will also be animated according to its animation config.
       animateInitialSelection: {
         type: Boolean,
         value: false
       }
 
     },
 
-    observers: [
-      '_selectedChanged(selected)'
-    ],
-
     listeners: {
+      'iron-select': '_onIronSelect',
       'neon-animation-finish': '_onNeonAnimationFinish'
     },
 
-    _selectedChanged: function(selected) {
+    _onIronSelect: function(event) {
+      var selectedPage = event.detail.item;
 
-      var selectedPage = this.selectedItem;
+      // Only consider child elements.
+      if (this.items.indexOf(selectedPage) < 0) {
+        return;
+      }
+      
       var oldPage = this._valueToItem(this._prevSelected) || false;
-      this._prevSelected = selected;
+      this._prevSelected = this.selected;
 
       // on initial load and if animateInitialSelection is negated, simply display selectedPage.
       if (!oldPage && !this.animateInitialSelection) {
         this._completeSelectedChanged();
         return;
       }
 
       // insert safari fix.
       this.animationConfig = [{
         name: 'opaque-animation',
@@ skipping 104 matching lines @@
       var selectedPage = this.selectedItem || this._valueToItem(this.selected);
       this.resizerShouldNotify = function(element) {
         return element == selectedPage;
       }
       this.notifyResize();
     }
 
   })
 
 })();