Update Polymer

third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js

Index: third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js b/third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js
index 5c1031b49b8adb14464b6b93fd377de94471e03b..6157fa11c460462c6db6cf43bd61ea0bee171c1b 100644
--- a/third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js
@@ -4,34 +4,38 @@
   Polymer.IronSelectableBehavior = {
 
       /**
-       *  Fired when iron-selector is activated (selected or deselected).
-       *  It is fired before the selected items are changed.
-       *  Cancel the event to abort selection.
+       * Fired when iron-selector is activated (selected or deselected).
+       * It is fired before the selected items are changed.
+       * Cancel the event to abort selection.
        *
        * @event iron-activate
-       *
-       **/
+       */
+
       /**
-       *  Fired when an item is selected
+       * Fired when an item is selected
        *
        * @event iron-select
-       *
-       **/
+       */
+
       /**
-       *  Fired when an item is deselected
+       * Fired when an item is deselected
        *
        * @event iron-deselect
+       */
+
+      /**
+       * Fired when the list of selectable items changes (e.g., items are
+       * added or removed). The detail of the event is a list of mutation
+       * records that describe what changed.
        *
-       **/
+       * @event iron-items-changed
+       */
 
     properties: {
 
       /**
        * If you want to use the attribute value of an element for `selected` instead of the index,
        * set this to the name of the attribute.
-       *
-       * @attribute attrForSelected
-       * @type {string}
        */
       attrForSelected: {
         type: String,
@@ -40,9 +44,6 @@
 
       /**
        * Gets or sets the selected element. The default is to use the index of the item.
-       *
-       * @attribute selected
-       * @type {string}
        */
       selected: {
         type: String,
@@ -51,9 +52,6 @@
 
       /**
        * Returns the currently selected item.
-       *
-       * @attribute selectedItem
-       * @type {Object}
        */
       selectedItem: {
         type: Object,
@@ -65,10 +63,6 @@
        * The event that fires from items when they are selected. Selectable
        * will listen for this event from items and update the selection state.
        * Set to empty string to listen to no events.
-       *
-       * @attribute activateEvent
-       * @type {string}
-       * @default 'tap'
        */
       activateEvent: {
         type: String,
@@ -79,17 +73,11 @@
       /**
        * This is a CSS selector string.  If this is set, only items that match the CSS selector
        * are selectable.
-       *
-       * @attribute selectable
-       * @type {string}
        */
       selectable: String,
 
       /**
        * The class to set on elements when selected.
-       *
-       * @attribute selectedClass
-       * @type {string}
        */
       selectedClass: {
         type: String,
@@ -98,9 +86,6 @@
 
       /**
        * The attribute to set on elements when selected.
-       *
-       * @attribute selectedAttribute
-       * @type {string}
        */
       selectedAttribute: {
         type: String,
@@ -111,10 +96,8 @@
        * The set of excluded elements where the key is the `localName` 
        * of the element that will be ignored from the item list.
        *
-       * @type {object}
        * @default {template: 1}
        */
-
       excludedLocalNames: {
         type: Object,
         value: function() {
@@ -283,7 +266,15 @@
 
     // observe items change under the given node.
     _observeItems: function(node) {
-      var observer = new MutationObserver(function() {
+      // TODO(cdata): Update this when we get distributed children changed.
+      var observer = new MutationObserver(function(mutations) {
+        // Let other interested parties know about the change so that
+        // we don't have to recreate mutation observers everywher.
+        this.fire('iron-items-changed', mutations, {
+          bubbles: false,
+          cancelable: false
+        });
+
         if (this.selected != null) {
           this._updateSelected();
         }