Revert "Rename polymer and cr_elements v0_8 to v1_0"

ui/webui/resources/cr_elements/v1_0/cr_checkbox/cr_checkbox.js

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview
- * `cr-checkbox` is a button that can be either checked or unchecked. User
- * can tap the checkbox to check or uncheck it. Usually you use checkboxes
- * to allow user to select multiple options from a set. If you have a single
- * ON/OFF option, avoid using a single checkbox and use `cr-toggle-button`
- * instead.
- *
- * Example:
- *     <cr-checkbox></cr-checkbox>
- *     <cr-checkbox checked></cr-checkbox>
- *
- * @element cr-checkbox
- */
-Polymer({
-  is: 'cr-checkbox',
-
-  properties: {
-    /**
-     * Gets or sets the state. `true` is checked and `false` is unchecked.
-     */
-    checked: {
-      type: Boolean,
-      value: false,
-      notify: true,
-      reflectToAttribute: true
-    },
-
-    /**
-     * If true, the user cannot interact with this element.
-     */
-    disabled: {
-      type: Boolean,
-      value: false,
-      reflectToAttribute: true
-    },
-  },
-
-  toggle: function() {
-    this.$.checkbox.toggle();
-  },
-});