Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components-chromium/paper-toggle-button/paper-toggle-button.css

 /*
 @license
 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 {
   display: inline-block;
 }
 
 :host([disabled]) {
-  opacity: 0.3;
   pointer-events: none;
 }
 
 :host(:focus) {
   outline:none;
 }
 
 :host .toggle-bar {
   background-color: var(--paper-toggle-button-unchecked-bar-color);
 }
@@ skipping 25 matching lines @@
   width: 36px;
   height: 14px;
 }
 
 #toggleBar {
   position: absolute;
   height: 100%;
   width: 100%;
   border-radius: 8px;
   pointer-events: none;
-  opacity: 0.26;
+  opacity: 0.4;
   transition: background-color linear .08s;
 }
 
 :host([checked]) #toggleBar {
   opacity: 0.5;
 }
 
+:host([disabled]) #toggleBar {
+  background-color: #000;
+  opacity: 0.12;
+}
+
 #toggleButton {
   position: absolute;
   top: -3px;
   height: 20px;
   width: 20px;
   border-radius: 50%;
-  box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.4);
+  box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.6);
   transition: -webkit-transform linear .08s, background-color linear .08s;
   transition: transform linear .08s, background-color linear .08s;
+  will-change: transform;
 }
 
 #toggleButton.dragging {
   -webkit-transition: none;
   transition: none;
 }
 
 :host([checked]) #toggleButton {
   -webkit-transform: translate(16px, 0);
   transform: translate(16px, 0);
 }
 
+:host([disabled]) #toggleButton {
+  background-color: #bdbdbd;
+  opacity: 1;
+}
+
 #ink {
   position: absolute;
   top: -14px;
   left: -14px;
   width: 48px;
   height: 48px;
-  pointer-events: none;
+  opacity: 0.5;
 }