[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-collapse/bower.json

Index: polymer_1.2.3/bower_components/iron-collapse/bower.json
diff --git a/polymer_1.0.4/bower_components/iron-collapse/bower.json b/polymer_1.2.3/bower_components/iron-collapse/bower.json
similarity index 93%
copy from polymer_1.0.4/bower_components/iron-collapse/bower.json
copy to polymer_1.2.3/bower_components/iron-collapse/bower.json
index 4c1a7a4e19b88d313407aac9ebb5062ae5847867..535338031298158a3d9bda203b5d3773b5af6699 100644
--- a/polymer_1.0.4/bower_components/iron-collapse/bower.json
+++ b/polymer_1.2.3/bower_components/iron-collapse/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "iron-collapse",
-  "version": "1.0.2",
+  "version": "1.0.5",
   "description": "Provides a collapsable container",
   "authors": [
     "The Polymer Authors"
@@ -27,5 +27,6 @@
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
     "paper-styles": "PolymerElements/paper-styles#^1.0.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
-  }
+  },
+  "main": "iron-collapse.html"
 }