[third_party] add polymer 1.2.3

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

 {
   "name": "iron-selector",
-  "version": "1.0.2",
+  "version": "1.0.8",
   "description": "Manages a set of elements that can be selected",
   "private": true,
   "license": "http://polymer.github.io/LICENSE.txt",
-  "main": [
-    "iron-selector.html"
-  ],
+  "main": "iron-selector.html",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "polymer",
     "selector"
   ],
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/iron-selector.git"
   },
+  "homepage": "https://github.com/PolymerElements/iron-selector",
+  "ignore": [],
   "dependencies": {
-    "polymer": "Polymer/polymer#^1.0.0"
+    "polymer": "Polymer/polymer#^1.2.0"
   },
   "devDependencies": {
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
+    "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
+    "paper-styles": "PolymerElements/paper-styles#^1.0.4",
     "test-fixture": "PolymerElements/test-fixture#^1.0.0",
     "web-component-tester": "*",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
   },
-  "homepage": "https://github.com/PolymerElements/iron-selector",
-  "_release": "1.0.2",
+  "_release": "1.0.8",
   "_resolution": {
     "type": "version",
-    "tag": "v1.0.2",
-    "commit": "ea22d91d11ba6f72c01faa952d5e600f9d1773cf"
+    "tag": "v1.0.8",
+    "commit": "e9a66727f3da0446f04956d4e4f1dcd51cdec2ff"
   },
   "_source": "git://github.com/PolymerElements/iron-selector.git",
   "_target": "^1.0.0",
   "_originalSource": "PolymerElements/iron-selector"
 }