Update Polymer from 1.2.1 -> 1.2.3

third_party/polymer/v1_0/components-chromium/paper-styles/bower.json

 {
   "name": "paper-styles",
-  "version": "1.0.12",
+  "version": "1.0.13",
   "description": "Common (global) styles for Material Design elements.",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-component",
     "polymer",
     "style"
   ],
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/paper-styles.git"
   },
   "main": "paper-styles.html",
   "license": "http://polymer.github.io/LICENSE.txt",
   "homepage": "https://github.com/polymerelements/paper-styles/",
   "ignore": [
     "/.*"
   ],
   "dependencies": {
     "iron-flex-layout": "PolymerElements/iron-flex-layout#^1.0.0",
     "font-roboto": "PolymerElements/font-roboto#^1.0.1",
     "polymer": "Polymer/polymer#^1.0.0"
   },
   "devDependencies": {
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
     "iron-component-page": "polymerelements/iron-component-page#^1.0.0"
   }
 }