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

third_party/polymer/v1_0/components/neon-animation/animations/cascaded-animation.html

Index: third_party/polymer/v1_0/components/neon-animation/animations/cascaded-animation.html
diff --git a/third_party/polymer/v1_0/components/neon-animation/animations/cascaded-animation.html b/third_party/polymer/v1_0/components/neon-animation/animations/cascaded-animation.html
index 9e089e99b5940f51b1c116cc8235e047e9a60780..303735c0f0ea9d6f588d284fac276aaeca84a6f5 100644
--- a/third_party/polymer/v1_0/components/neon-animation/animations/cascaded-animation.html
+++ b/third_party/polymer/v1_0/components/neon-animation/animations/cascaded-animation.html
@@ -40,6 +40,7 @@ Configuration:
 
     properties: {
 
+      /** @type {!Polymer.IronMeta} */
       _animationMeta: {
         type: Object,
         value: function() {
@@ -49,13 +50,23 @@ Configuration:
 
     },
 
+    /**
+     * @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;
@@ -71,12 +82,19 @@ Configuration:
         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);
+      }
     }
 
   });