[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-selector/iron-multi-selectable.html

Index: polymer_1.2.3/bower_components/iron-selector/iron-multi-selectable.html
diff --git a/polymer_1.0.4/bower_components/iron-selector/iron-multi-selectable.html b/polymer_1.2.3/bower_components/iron-selector/iron-multi-selectable.html
similarity index 92%
copy from polymer_1.0.4/bower_components/iron-selector/iron-multi-selectable.html
copy to polymer_1.2.3/bower_components/iron-selector/iron-multi-selectable.html
index ba9455ded233d8b00081e14c2bf00e16dab6959e..906e9204d739dc10c484a6e090c989afbdece8a3 100644
--- a/polymer_1.0.4/bower_components/iron-selector/iron-multi-selectable.html
+++ b/polymer_1.2.3/bower_components/iron-selector/iron-multi-selectable.html
@@ -72,6 +72,11 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       this._selection.multi = multi;
     },
 
+    get _shouldUpdateSelection() {
+      return this.selected != null ||
+        (this.selectedValues != null && this.selectedValues.length);
+    },
+
     _updateSelected: function() {
       if (this.multi) {
         this._selectMulti(this.selectedValues);
@@ -103,9 +108,9 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       var i = this.selectedValues.indexOf(value);
       var unselected = i < 0;
       if (unselected) {
-        this.selectedValues.push(value);
+        this.push('selectedValues',value);
       } else {
-        this.selectedValues.splice(i, 1);
+        this.splice('selectedValues',i,1);
       }
       this._selection.setItemSelected(this._valueToItem(value), unselected);
     }