Add Closure compiler externs and a concrete EventType enum for paper-…

…radio-button. Note that the externs are dependent on the Polymer externs in the pull request at Polymer/polymer#769.

eventtype.js

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+/**
+ * @license
+ * Copyright (c) 2014 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.
+ */
+
+goog.provide('PaperRadioButtonEventType');
+
+
+/**
+ * Constants for event names fired by paper-radio-button elements.
+ * @enum {string}
+ */
+PaperRadioButtonEventType = {
+  // Fired when the checked state changes due to user interaction.
+  CHANGE: 'change',
+  // Fired when the checked state changes.
+  CORE_CHANGE: 'core-change'
+};
+

paper-radio-button.externs.js

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+/**
+ * @fileoverview Closure compiler externs for paper-radio-button. See docs at
+ * https://www.polymer-project.org/docs/elements/paper-elements.html#paper-radio-button.
+ */
+
+
+/** @constructor @extends {PolymerElement} */
+var PaperRadioButtonElement = function() {};
+
+
+/**
+ * Gets or sets the state, true is checked and false is unchecked. Defaults to
+ * false.
+ * @type {boolean}
+ */
+PaperRadioButtonElement.prototype.checked;
+
+
+/**
+ * The label for the radio button. Defaults to an empty string.
+ * @type {string}
+ */
+PaperRadioButtonElement.prototype.label;
+
+
+/**
+ * Normally the user cannot uncheck the radio button by tapping once checked.
+ * Setting this property to true makes the radio button toggleable from checked
+ * to unchecked.
+ * @type {boolean}
+ */
+PaperRadioButtonElement.prototype.toggles;
+
+
+/**
+ * If true, the user cannot interact with this element.
+ * @type {boolean}
+ */
+PaperRadioButtonElement.prototype.disabled;
+