Lay groudwork to Closure compile JavaScript

ui/webui/resources/js/cr.js

Index: ui/webui/resources/js/cr.js
diff --git a/ui/webui/resources/js/cr.js b/ui/webui/resources/js/cr.js
index a3d1263238642ed1d85e9709126cc0b50a1524fe..810c6bb5dee55bd2fa446f2187899019ffd6c981 100644
--- a/ui/webui/resources/js/cr.js
+++ b/ui/webui/resources/js/cr.js
@@ -10,7 +10,7 @@
 var global = this;
 
 /** Platform, package, object property, and Event support. **/
-this.cr = (function() {
+var cr = global.cr = (function() {
   'use strict';
 
   /**
@@ -68,7 +68,7 @@ this.cr = (function() {
 
   /**
    * The kind of property to define in {@code defineProperty}.
-   * @enum {number}
+   * @enum {string}
    * @const
    */
   var PropertyKind = {
@@ -94,8 +94,8 @@ this.cr = (function() {
    * Helper function for defineProperty that returns the getter to use for the
    * property.
    * @param {string} name The name of the property.
-   * @param {cr.PropertyKind} kind The kind of the property.
-   * @return {function():*} The getter for the property.
+   * @param {PropertyKind} kind The kind of the property.
+   * @return {Function|undefined} The getter for the property.
    */
   function getGetter(name, kind) {
     switch (kind) {
@@ -122,11 +122,11 @@ this.cr = (function() {
    * kind.
    * @param {string} name The name of the property we are defining the setter
    *     for.
-   * @param {cr.PropertyKind} kind The kind of property we are getting the
+   * @param {PropertyKind} kind The kind of property we are getting the
    *     setter for.
-   * @param {function(*):void} opt_setHook A function to run after the property
-   *     is set, but before the propertyChange event is fired.
-   * @return {function(*):void} The function to use as a setter.
+   * @param {Function=} opt_setHook A function to run after the property is set,
+   *     but before the propertyChange event is fired.
+   * @return {Function|undefined} The function to use as a setter.
    */
   function getSetter(name, kind, opt_setHook) {
     switch (kind) {
@@ -179,15 +179,16 @@ this.cr = (function() {
    * property change event with the type {@code name + 'Change'} is fired.
    * @param {!Object} obj The object to define the property for.
    * @param {string} name The name of the property.
-   * @param {cr.PropertyKind=} opt_kind What kind of underlying storage to use.
-   * @param {function(*):void} opt_setHook A function to run after the
+   * @param {PropertyKind=} opt_kind What kind of underlying storage to use.
+   * @param {function(*):void=} opt_setHook A function to run after the
    *     property is set, but before the propertyChange event is fired.
+   * @suppress {checkTypes}
    */
   function defineProperty(obj, name, opt_kind, opt_setHook) {
     if (typeof obj == 'function')
       obj = obj.prototype;
 
-    var kind = opt_kind || PropertyKind.JS;
+    var kind = /** @type {PropertyKind} */ (opt_kind || PropertyKind.JS);
 
     if (!obj.__lookupGetter__(name))
       obj.__defineGetter__(name, getGetter(name, kind));