Typecheck JS files for chrome://history

ui/webui/resources/js/cr/ui/command.js

Index: ui/webui/resources/js/cr/ui/command.js
diff --git a/ui/webui/resources/js/cr/ui/command.js b/ui/webui/resources/js/cr/ui/command.js
index e06cd6857725b6b299f9cef8bff7b93184f7640a..302219cdf74ea181f6814a8e2e3f4ecf19282dca 100644
--- a/ui/webui/resources/js/cr/ui/command.js
+++ b/ui/webui/resources/js/cr/ui/command.js
@@ -78,7 +78,7 @@ cr.define('cr.ui', function() {
      * Initializes the command.
      */
     decorate: function() {
-      CommandManager.init(this.ownerDocument);
+      CommandManager.init(assert(this.ownerDocument));
 
       if (this.hasAttribute('shortcut'))
         this.shortcut = this.getAttribute('shortcut');
@@ -163,25 +163,21 @@ cr.define('cr.ui', function() {
 
   /**
    * The label of the command.
-   * @type {string}
    */
   cr.defineProperty(Command, 'label', cr.PropertyKind.ATTR);
 
   /**
    * Whether the command is disabled or not.
-   * @type {boolean}
    */
   cr.defineProperty(Command, 'disabled', cr.PropertyKind.BOOL_ATTR);
 
   /**
    * Whether the command is hidden or not.
-   * @type {boolean}
    */
   cr.defineProperty(Command, 'hidden', cr.PropertyKind.BOOL_ATTR);
 
   /**
    * Whether the command is checked or not.
-   * @type {boolean}
    */
   cr.defineProperty(Command, 'checked', cr.PropertyKind.BOOL_ATTR);
 
@@ -191,18 +187,16 @@ cr.define('cr.ui', function() {
    * If false, the keyboard shortcut text (eg. "Ctrl+X" for the cut command)
    * is displayed in menu when the command is assosiated with a menu item.
    * Otherwise, no text is displayed.
-   *
-   * @type {boolean}
    */
   cr.defineProperty(Command, 'hideShortcutText', cr.PropertyKind.BOOL_ATTR);
 
   /**
    * Dispatches a canExecute event on the target.
-   * @param {cr.ui.Command} command The command that we are testing for.
-   * @param {Element} target The target element to dispatch the event on.
+   * @param {!cr.ui.Command} command The command that we are testing for.
+   * @param {EventTarget} target The target element to dispatch the event on.
    */
   function dispatchCanExecuteEvent(command, target) {
-    var e = new CanExecuteEvent(command, true);
+    var e = new CanExecuteEvent(command);
     target.dispatchEvent(e);
     command.disabled = !e.canExecute;
   }