[Polymer] Roll polymer to latest version

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

 {
   "name": "paper-menu-button",
-  "version": "1.0.3",
-  "description": "",
+  "version": "1.0.4",
+  "description": "A material design element that composes a trigger and a dropdown menu",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "web-component",
-    "polymer"
+    "polymer",
+    "menu",
+    "button"
   ],
   "main": "paper-menu-button.html",
   "private": true,
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/paper-menu-button"
   },
   "license": "MIT",
   "homepage": "https://github.com/PolymerElements/paper-menu-button",
   "dependencies": {
@@ skipping 11 matching lines @@
     "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
     "web-component-tester": "*",
     "paper-menu": "polymerelements/paper-menu#^1.0.0",
     "paper-icon-button": "polymerelements/paper-icon-button#^1.0.0",
     "iron-icons": "polymerelements/iron-icons#^1.0.0",
     "paper-button": "polymerelements/paper-button#^1.0.0",
     "paper-item": "polymerelements/paper-item#^1.0.0",
     "iron-image": "polymerelements/iron-image#^1.0.0",
     "iron-icon": "polymerelements/iron-icon#^1.0.0"
-  }
+  },
+  "ignore": []
 }