Update Polymer from 1.2.1 -> 1.2.3

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

 {
   "name": "paper-item",
-  "version": "1.0.6",
+  "version": "1.1.1",
   "description": "A material-design styled list item",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "polymer",
     "item"
   ],
   "main": [
     "paper-item.html",
     "paper-icon-item.html",
     "paper-item-body.html"
   ],
   "private": true,
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/paper-item"
   },
   "license": "MIT",
   "homepage": "https://github.com/PolymerElements/paper-item",
   "ignore": [],
   "dependencies": {
     "polymer": "Polymer/polymer#^1.1.0",
     "paper-styles": "PolymerElements/paper-styles#^1.0.0",
+    "iron-flex-layout": "PolymerElements/iron-flex-layout#^1.0.0",
     "iron-behaviors": "polymerelements/iron-behaviors#^1.0.0"
   },
   "devDependencies": {
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
     "iron-icon": "PolymerElements/iron-icon#^1.0.0",
     "iron-icons": "PolymerElements/iron-icons#^1.0.0",
     "paper-checkbox": "PolymerElements/paper-checkbox#^1.0.0",
     "paper-icon-button": "PolymerElements/paper-icon-button#^1.0.0",
+    "paper-input": "PolymerElements/paper-input#^1.0.0",
     "paper-toggle-button": "PolymerElements/paper-toggle-button#^1.0.0",
     "test-fixture": "PolymerElements/test-fixture#^1.0.0",
-    "web-component-tester": "Polymer/web-component-tester#^3.3.0",
-    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
+    "web-component-tester": "Polymer/web-component-tester#^3.4.0",
+    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
+    "iron-test-helpers": "PolymerElements/iron-test-helpers#^1.0.0"
   }
 }