Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components/neon-animation/animations/cascaded-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
 -->
 
@@ skipping 22 matching lines @@
   Polymer({
 
     is: 'cascaded-animation',
 
     behaviors: [
       Polymer.NeonAnimationBehavior
     ],
 
     properties: {
 
+      /** @type {!Polymer.IronMeta} */
       _animationMeta: {
         type: Object,
         value: function() {
           return new Polymer.IronMeta({type: 'animation'});
         }
       }
 
     },
 
+    /**
+     * @param {{
+     *   animation: string,
+     *   nodes: !Array<!Element>,
+     *   nodeDelay: (number|undefined),
+     *   timing: (Object|undefined)
+     *  }} config
+     */
     configure: function(config) {
-      var animationConstructor = this._animationMeta.byKey(config.animation);
+      var animationConstructor = /** @type {Function} */ (
+          this._animationMeta.byKey(config.animation));
       if (!animationConstructor) {
         console.warn(this.is + ':', 'constructor for', config.animation, 'not found!');
         return;
       }
 
+      this._animations = [];
       var nodes = config.nodes;
       var effects = [];
       var nodeDelay = config.nodeDelay || 50;
 
       config.timing = config.timing || {};
       config.timing.delay = config.timing.delay || 0;
 
       var oldDelay = config.timing.delay;
       for (var node, index = 0; node = nodes[index]; index++) {
         config.timing.delay += nodeDelay;
         config.node = node;
 
         var animation = new animationConstructor();
         var effect = animation.configure(config);
 
+        this._animations.push(animation);
         effects.push(effect);
       }
       config.timing.delay = oldDelay;
 
       this._effect = new GroupEffect(effects);
       return this._effect;
+    },
+
+    complete: function() {
+      for (var animation, index = 0; animation = this._animations[index]; index++) {
+        animation.complete(animation.config);
+      }
     }
 
   });
 
 </script>