[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-meta/iron-meta.html

Index: polymer_1.2.3/bower_components/iron-meta/iron-meta.html
diff --git a/polymer_1.0.4/bower_components/iron-meta/iron-meta.html b/polymer_1.2.3/bower_components/iron-meta/iron-meta.html
similarity index 94%
copy from polymer_1.0.4/bower_components/iron-meta/iron-meta.html
copy to polymer_1.2.3/bower_components/iron-meta/iron-meta.html
index 4b3431182823c53da1630bbc5ff79ab2c5a9a49d..1521be5c0eab27d3266e49d69f048cbda1d19e07 100644
--- a/polymer_1.0.4/bower_components/iron-meta/iron-meta.html
+++ b/polymer_1.2.3/bower_components/iron-meta/iron-meta.html
@@ -33,7 +33,7 @@ attributes or use child nodes to define additional metadata.
 Now I can access that element (and it's metadata) from any iron-meta instance
 via the byKey method, e.g.
 
-    meta.byKey('info').getAttribute('value').
+    meta.byKey('info').getAttribute('value');
 
 Pure imperative form would be like:
 
@@ -58,6 +58,7 @@ Or, in a Polymer element, you can include a meta in your template:
     // monostate data
     var metaDatas = {};
     var metaArrays = {};
+    var singleton = null;
 
     Polymer.IronMeta = Polymer({
 
@@ -110,9 +111,15 @@ Or, in a Polymer element, you can include a meta in your template:
 
       },
 
+      hostAttributes: {
+        hidden: true
+      },
+
       /**
        * Only runs if someone invokes the factory/constructor directly
        * e.g. `new Polymer.IronMeta()`
+       *
+       * @param {{type: (string|undefined), key: (string|undefined), value}=} config
        */
       factoryImpl: function(config) {
         if (config) {
@@ -204,6 +211,13 @@ Or, in a Polymer element, you can include a meta in your template:
 
     });
 
+    Polymer.IronMeta.getIronMeta = function getIronMeta() {
+       if (singleton === null) {
+         singleton = new Polymer.IronMeta();
+       }
+       return singleton;
+     };
+
     /**
     `iron-meta-query` can be used to access infomation stored in `iron-meta`.
 
@@ -270,6 +284,8 @@ Or, in a Polymer element, you can include a meta in your template:
       /**
        * Actually a factory method, not a true constructor. Only runs if
        * someone invokes it directly (via `new Polymer.IronMeta()`);
+       *
+       * @param {{type: (string|undefined), key: (string|undefined)}=} config
        */
       factoryImpl: function(config) {
         if (config) {