Roll Polymer to 1.3.1

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

 {
   "name": "paper-tooltip",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Material design tooltip popup for content",
   "authors": [
     "The Polymer Authors"
   ],
   "keywords": [
     "web-components",
     "polymer",
     "tooltip"
   ],
-  "main": [
-    "paper-tooltip.html"
-  ],
+  "main": "paper-tooltip.html",
   "private": true,
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/paper-tooltip.git"
   },
   "license": "http://polymer.github.io/LICENSE.txt",
   "homepage": "https://github.com/PolymerElements/paper-tooltip",
   "ignore": [],
   "dependencies": {
     "polymer": "Polymer/polymer#^1.1.0",
     "paper-styles": "PolymerElements/paper-styles#^1.0.0",
     "neon-animation": "PolymerElements/neon-animation#^1.0.0"
   },
   "devDependencies": {
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
-    "web-component-tester": "*",
+    "web-component-tester": "^4.0.0",
     "test-fixture": "PolymerElements/test-fixture#^1.0.0",
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
+    "iron-demo-helpers": "polymerelements/iron-demo-helpers#^1.0.0",
     "iron-test-helpers": "PolymerElements/iron-test-helpers#^1.0.0",
     "paper-icon-button": "PolymerElements/paper-icon-button#^1.0.0"
   },
-  "_release": "1.1.1",
+  "_release": "1.1.2",
   "_resolution": {
     "type": "version",
-    "tag": "v1.1.1",
-    "commit": "0b274f0ad241877fd316101b43fe48b013a470b6"
+    "tag": "v1.1.2",
+    "commit": "6be894127678900f6e506b56fc9622ab768c03aa"
   },
   "_source": "git://github.com/PolymerElements/paper-tooltip.git",
   "_target": "^1.0.0",
   "_originalSource": "PolymerElements/paper-tooltip"
 }