[third_party] add polymer 1.2.3

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

 {
   "name": "iron-behaviors",
-  "version": "1.0.4",
+  "version": "1.0.12",
   "description": "Provides a set of behaviors for the iron elements",
   "private": true,
   "authors": [
     "The Polymer Authors"
   ],
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/iron-behaviors.git"
   },
   "main": [
     "iron-button-state.html",
     "iron-control-state.html"
   ],
   "license": "http://polymer.github.io/LICENSE.txt",
   "dependencies": {
-    "polymer": "Polymer/polymer#^1.0.0",
+    "polymer": "Polymer/polymer#^1.2.0",
     "iron-a11y-keys-behavior": "PolymerElements/iron-a11y-keys-behavior#^1.0.0"
   },
   "devDependencies": {
     "paper-styles": "polymerelements/paper-styles#^1.0.2",
+    "paper-input": "polymerelements/paper-input#^1.0.0",
     "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
     "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
     "test-fixture": "polymerelements/test-fixture#^1.0.0",
-    "web-component-tester": "*",
+    "web-component-tester": "polymer/web-component-tester#^3.4.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
-  }
+  },
+  "ignore": []
 }