Merge pull request Polymer#988 from rickymarcon/master

Add onMutation to watch for children updates.

Author: ebidel

0.5/elements/feature-carousel.html

@@ -28,11 +28,14 @@
       interval: null, // num milliseconds to cycle panels.
       selected: 0,
       domReady: function() {
-        // TODO: use onMutation to watch for children updates.
+        this.childrenUpdated();
+        this.startCycler();
+      },
+      childrenUpdated: function(observer, mutations) {
         this.panels = Array.prototype.slice.call(
             this.$.content.getDistributedNodes());
 
-        this.startCycler();
+        this.onMutation(this, this.childrenUpdated);
       },
       next: function(opt_Index, opt_backwards) {
         var backwards = opt_backwards == true;

0.8/elements/feature-carousel.html

@@ -28,11 +28,14 @@
       interval: null, // num milliseconds to cycle panels.
       selected: 0,
       domReady: function() {
-        // TODO: use onMutation to watch for children updates.
+        this.childrenUpdated();
+        this.startCycler();
+      },
+      childrenUpdated: function(observer, mutations) {
         this.panels = Array.prototype.slice.call(
             this.$.content.getDistributedNodes());
 
-        this.startCycler();
+        this.onMutation(this, this.childrenUpdated);
       },
       next: function(opt_Index, opt_backwards) {
         var backwards = opt_backwards == true;