Update Polymer from 1.2.1 -> 1.2.3

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

 {
   "name": "paper-menu",
-  "version": "1.1.1",
+  "version": "1.2.0",
   "description": "Implements an accessible material design menu",
   "authors": "The Polymer Authors",
   "keywords": [
     "web-components",
     "polymer",
     "menu"
   ],
   "main": [
     "paper-menu.html",
     "paper-submenu.html"
   ],
   "private": true,
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/paper-menu"
   },
   "license": "http://polymer.github.io/LICENSE.txt",
   "homepage": "https://github.com/PolymerElements/paper-menu",
   "ignore": [],
   "dependencies": {
+    "polymer": "Polymer/polymer#^1.1.0",
+    "iron-behaviors": "PolymerElements/iron-behaviors#^1.0.0",
+    "iron-collapse": "PolymerElements/iron-collapse#^1.0.0",
     "iron-menu-behavior": "PolymerElements/iron-menu-behavior#^1.0.0",
-    "paper-styles": "PolymerElements/paper-styles#^1.0.0",
-    "iron-collapse": "PolymerElements/iron-collapse#^1.0.0",
-    "iron-behaviors": "PolymerElements/iron-behaviors#^1.0.0",
-    "polymer": "Polymer/polymer#^1.0.0"
+    "iron-flex-layout": "PolymerElements/iron-flex-layout#^1.0.0",
+    "paper-styles": "PolymerElements/paper-styles#^1.0.0"
   },
   "devDependencies": {
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
+    "iron-test-helpers": "PolymerElements/iron-test-helpers#^1.0.0",
     "paper-item": "PolymerElements/paper-item#^1.0.0",
     "test-fixture": "PolymerElements/test-fixture#^1.0.0",
-    "iron-test-helpers": "PolymerElements/iron-test-helpers#^1.0.0",
     "web-component-tester": "*",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
   }
 }