[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-form-element-behavior/demo/simple-form.html

Index: polymer_1.2.3/bower_components/iron-form-element-behavior/demo/simple-form.html
diff --git a/polymer_1.0.4/bower_components/iron-form-element-behavior/demo/simple-form.html b/polymer_1.2.3/bower_components/iron-form-element-behavior/demo/simple-form.html
similarity index 69%
copy from polymer_1.0.4/bower_components/iron-form-element-behavior/demo/simple-form.html
copy to polymer_1.2.3/bower_components/iron-form-element-behavior/demo/simple-form.html
index 82acbe5f368a8f96dbaef83988da25e497f2ec62..4dc5dc6bb8f636d5f360a74899dd9eb6858c890a 100644
--- a/polymer_1.0.4/bower_components/iron-form-element-behavior/demo/simple-form.html
+++ b/polymer_1.2.3/bower_components/iron-form-element-behavior/demo/simple-form.html
@@ -25,7 +25,8 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
     },
 
     listeners: {
-      'iron-form-element-register': '_elementRegistered'
+      'iron-form-element-register': '_elementRegistered',
+      'iron-form-element-unregister': '_elementUnregistered'
     },
 
     ready: function() {
@@ -34,7 +35,17 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 
     _elementRegistered: function(e) {
       this.formElements.push(e.target);
-      this.fire('element-registered');
+      e.target._parentForm = this;
+    },
+
+    _elementUnregistered: function(e) {
+      var target = e.detail.target;
+      if (target) {
+        var index = this.formElements.indexOf(target);
+        if (index > -1) {
+          this.formElements.splice(index, 1);
+        }
+      }
     }
 
   });