Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.css

 /*
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */
 
 :host {
@@ skipping 15 matching lines @@
 }
 
 :host #ink {
   position: absolute;
   top: -16px;
   left: -16px;
   width: 48px;
   height: 48px;
   color: var(--paper-radio-button-unchecked-ink-color, --primary-text-color);
   opacity: 0.6;
+  pointer-events: none;
 }
 
 :host #ink[checked] {
   color: var(--paper-radio-button-checked-ink-color, --default-primary-color);
 }
 
 :host #offRadio {
   position: absolute;
   top: 0px;
   left: 0px;
   width: 12px;
   height: 12px;
   border-radius: 50%;
   border: solid 2px;
+  background-color: var(--paper-radio-button-unchecked-background-color, transparent);
   border-color: var(--paper-radio-button-unchecked-color, --primary-text-color);
   transition: border-color 0.28s;
 }
 
 :host #onRadio {
   position: absolute;
   top: 4px;
   left: 4px;
   width: 8px;
   height: 8px;
@@ skipping 40 matching lines @@
 
 :host([disabled][checked]) #onRadio {
   background-color: var(--paper-radio-button-unchecked-color, --primary-text-color);
   opacity: 0.5;
 }
 
 :host([disabled]) #radioLabel {
   /* slightly darker than the button, so that it's readable */
   opacity: 0.65;
 }