[Polymer] update third_party polymer

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

 {
   "name": "iron-location",
-  "version": "0.8.1",
+  "version": "0.8.2",
   "description": "Bidirectional data binding into the page's URL.",
   "private": true,
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "polymer",
     "routing"
   ],
-  "main": "iron-location.html",
+  "main": [
+    "iron-location.html",
+    "iron-query-params.html"
+  ],
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/iron-location.git"
   },
   "license": "http://polymer.github.io/LICENSE.txt",
   "homepage": "https://github.com/PolymerElements/iron-location",
   "ignore": [],
   "dependencies": {
     "polymer": "Polymer/polymer#^1.0.0"
   },
   "devDependencies": {
     "promise-polyfill": "polymerlabs/promise-polyfill#^1.0.0",
     "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
     "iron-flex-layout": "polymerelements/iron-flex-layout#^1.0.0",
     "paper-input": "polymerelements/paper-input#^1.0.0",
     "paper-slider": "polymerelements/paper-slider#^1.0.0",
     "paper-styles": "polymerelements/paper-styles#^1.0.0",
     "test-fixture": "polymerelements/test-fixture#^1.0.0",
     "web-component-tester": "^4.0.0",
-    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
+    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
+    "iron-demo-helpers": "PolymerElements/iron-demo-helpers#^1.2.3"
   }
 }