Print Preview: Fix compile errors in settings/ directory

chrome/browser/resources/print_preview/settings/advanced_options_settings.js

Index: chrome/browser/resources/print_preview/settings/advanced_options_settings.js
diff --git a/chrome/browser/resources/print_preview/settings/advanced_options_settings.js b/chrome/browser/resources/print_preview/settings/advanced_options_settings.js
index e1284a749008675c20693907fa04844d0a27577e..f2b63d4a7690097d43f0b4584a0f44e92c78e6c7 100644
--- a/chrome/browser/resources/print_preview/settings/advanced_options_settings.js
+++ b/chrome/browser/resources/print_preview/settings/advanced_options_settings.js
@@ -7,7 +7,7 @@ cr.define('print_preview', function() {
 
   /**
    * Print options section to control printer advanced options.
-   * @param {!print_preview.ticket_item.VendorItems} ticketItem Ticket item to
+   * @param {!print_preview.ticket_items.VendorItems} ticketItem Ticket item to
    *     check settings availability.
    * @param {!print_preview.DestinationStore} destinationStore Used to determine
    *     the selected destination.
@@ -28,7 +28,7 @@ cr.define('print_preview', function() {
      * @private {!print_preview.DestinationStore}
      */
     this.destinationStore_ = destinationStore;
-  };
+  }
 
   /**
    * Event types dispatched by the component.
@@ -77,11 +77,11 @@ cr.define('print_preview', function() {
     },
 
     /**
-     * @return {HTMLElement}
+     * @return {!HTMLElement}
      * @private
      */
     getButton_: function() {
-      return this.getChildElement('.advanced-options-settings-button');
+      return assert(this.getChildElement('.advanced-options-settings-button'));
     },
 
     /**