Fix ChromeVox Next compile.

chrome/browser/resources/chromeos/chromevox/common/chrome_extension_externs.js

 // Copyright 2014 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 Definitions for the Chromium extensions API used by ChromeVox.
  *
  * @externs
  */
@@ skipping 939 matching lines @@
 
 
 /**
  * @param {Function} callback
  * @return {boolean}
  */
 ChromeEvent.prototype.hasListener = function(callback) {};
 
 
 /** @return {boolean} */
-ChromeEvent.prototype.hasListeners = function(callback) {};
+ChromeEvent.prototype.hasListeners = function() {};
 
 
 /**
  * @constructor
  */
 function Port() {}
 
 
 /** @type {string} */
 Port.prototype.name;
@@ skipping 231 matching lines @@
  * @param {string|!Object|null} keys
  * @param {function()=} opt_callback
  */
 chrome.storage.local.remove = function(keys, opt_callback) {};
 
 
 /**
  * @type {ChromeEvent}
  */
 chrome.storage.onChanged;
+
+
+/**
+ * @const
+ */
+chrome.automation = {};
+
+/**
+ * @constructor
+ */
+chrome.automation.AutomationNode = function() {};
+
+
+/**
+ * @type {!Object}
+ */
+chrome.automation.AutomationNode.prototype.attributes;
+
+
+/**
+ * @return {chrome.automation.AutomationNode}
+ */
+chrome.automation.AutomationNode.prototype.firstChild = function() {};
+
+
+/**
+ * @return {chrome.automation.AutomationNode}
+ */
+chrome.automation.AutomationNode.prototype.lastChild = function() {};
+
+
+/**
+ * @return {chrome.automation.AutomationNode}
+ */
+chrome.automation.AutomationNode.prototype.nextSibling = function() {};
+
+
+/**
+ * @return {chrome.automation.AutomationNode}
+ */
+chrome.automation.AutomationNode.prototype.previousSibling = function() {};
+
+
+/**
+ * @return {chrome.automation.AutomationNode}
+ */
+chrome.automation.AutomationNode.prototype.parent = function() {};
+
+
+/**
+ * @param {string} eventType
+ * @param {function(chrome.automation.AutomationNode) : void} callback
+ * @param {boolean} capture
+ */
+chrome.automation.AutomationNode.prototype.addEventListener =
+    function(eventType, callback, capture) {};
+
+
+/**
+ * @param {string} eventType
+ * @param {function(chrome.automation.AutomationNode) : void} callback
+ * @param {boolean} capture
+ */
+chrome.automation.AutomationNode.prototype.removeEventListener =
+    function(eventType, callback, capture) {};
+
+
+/**
+ * @param {function(chrome.automation.AutomationNode)} callback
+ */
+chrome.automation.getDesktop = function(callback) {};
+
+
+/**
+ * @param {function(chrome.automation.AutomationNode)} callback
+ */
+chrome.automation.getTree = function(callback) {};
+
+/**
+ * @const
+ */
+chrome.commands = {};
+
+
+/**
+ * @type {ChromeEvent}
+ */
+chrome.commands.onCommand;