[Polymer] Roll polymer to latest version

third_party/polymer/v1_0/components-chromium/iron-dropdown/bower.json

 {
   "name": "iron-dropdown",
-  "version": "1.0.6",
-  "description": "",
+  "version": "1.1.0",
+  "description": "An unstyled element that works similarly to a native browser select",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "web-component",
     "polymer"
   ],
   "main": "iron-dropdown.html",
   "private": true,
@@ skipping 12 matching lines @@
     "iron-a11y-keys-behavior": "polymerelements/iron-a11y-keys-behavior#^1.0.0"
   },
   "devDependencies": {
     "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
     "test-fixture": "polymerelements/test-fixture#^1.0.0",
     "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
     "paper-styles": "polymerelements/paper-styles#^1.0.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
     "web-component-tester": "*",
     "iron-image": "polymerelements/iron-image#^1.0.0"
-  }
+  },
+  "ignore": []
 }