[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 12 matching lines @@
     "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"
   },
-  "_release": "1.0.3",
+  "ignore": [],
+  "_release": "1.0.4",
   "_resolution": {
     "type": "version",
-    "tag": "v1.0.3",
-    "commit": "24abacffd443f967125f5eae580eadc7b90f41c7"
+    "tag": "v1.0.4",
+    "commit": "886c7eb904a5d59652adc0a127a8e0eab7e0f663"
   },
   "_source": "git://github.com/PolymerElements/paper-menu-button.git",
   "_target": "^1.0.0",
   "_originalSource": "PolymerElements/paper-menu-button"
 }