Update Polymer from 1.2.1 -> 1.2.3

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

 {
   "name": "paper-behaviors",
-  "version": "1.0.9",
+  "version": "1.0.10",
   "description": "Common behaviors across the paper elements",
   "authors": [
     "The Polymer Authors"
   ],
   "main": [
     "paper-button-behavior.html",
     "paper-checked-element-behavior.html",
     "paper-inky-focus-behavior.html"
   ],
   "keywords": [
     "web-components",
     "web-component",
     "polymer",
     "paper",
     "behavior"
   ],
   "private": true,
   "repository": {
     "type": "git",
     "url": "git://github.com/PolymerElements/paper-behaviors"
   },
   "license": "http://polymer.github.io/LICENSE.txt",
   "homepage": "https://github.com/PolymerElements/paper-behaviors",
   "dependencies": {
     "iron-behaviors": "PolymerElements/iron-behaviors#^1.0.0",
     "iron-checked-element-behavior": "PolymerElements/iron-checked-element-behavior#^1.0.0",
-    "polymer": "Polymer/polymer#^1.0.0"
+    "polymer": "Polymer/polymer#^1.2.1"
   },
   "devDependencies": {
     "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
     "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
     "paper-material": "PolymerElements/paper-material#^1.0.0",
     "paper-ripple": "PolymerElements/paper-ripple#^1.0.0",
     "test-fixture": "PolymerElements/test-fixture#^1.0.0",
-    "web-component-tester": "*",
+    "web-component-tester": "^3.4.0",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
-  }
+  },
+  "ignore": []
 }