Fix some JS style nits.

ui/webui/resources/js/cr/ui/page_manager/page_manager.js

Index: ui/webui/resources/js/cr/ui/page_manager/page_manager.js
diff --git a/ui/webui/resources/js/cr/ui/page_manager/page_manager.js b/ui/webui/resources/js/cr/ui/page_manager/page_manager.js
index ae6283a8c019a587914e1b56054ab7686f44454e..95fd02580ce3016e73efc932635583377220218d 100644
--- a/ui/webui/resources/js/cr/ui/page_manager/page_manager.js
+++ b/ui/webui/resources/js/cr/ui/page_manager/page_manager.js
@@ -28,21 +28,21 @@ cr.define('cr.ui.pageManager', function() {
 
     /**
      * Root pages. Maps lower-case page names to the respective page object.
-     * @type {!Object.<string, !cr.ui.pageManager.Page>}
+     * @type {!Object<string, !cr.ui.pageManager.Page>}
      */
     registeredPages: {},
 
     /**
      * Pages which are meant to behave like modal dialogs. Maps lower-case
      * overlay names to the respective overlay object.
-     * @type {!Object.<string, !cr.ui.pageManager.Page>}
+     * @type {!Object<string, !cr.ui.pageManager.Page>}
      * @private
      */
     registeredOverlayPages: {},
 
     /**
      * Observers will be notified when opening and closing overlays.
-     * @type {!Array.<!cr.ui.pageManager.PageManager.Observer>}
+     * @type {!Array<!cr.ui.pageManager.PageManager.Observer>}
      */
     observers_: [],