Print Preview: Make getChildElement return required HTMLElement

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

Index: chrome/browser/resources/print_preview/settings/layout_settings.js
diff --git a/chrome/browser/resources/print_preview/settings/layout_settings.js b/chrome/browser/resources/print_preview/settings/layout_settings.js
index 1113491b7dd9c0819f8231fb3c84c84996cbbbd4..cd1aeed5fcbf9e715615168817e7be651ed0599d 100644
--- a/chrome/browser/resources/print_preview/settings/layout_settings.js
+++ b/chrome/browser/resources/print_preview/settings/layout_settings.js
@@ -46,7 +46,7 @@ cr.define('print_preview', function() {
     enterDocument: function() {
       print_preview.SettingsSection.prototype.enterDocument.call(this);
       this.tracker.add(
-          assert(this.select_), 'change', this.onSelectChange_.bind(this));
+          this.select_, 'change', this.onSelectChange_.bind(this));
       this.tracker.add(
           this.landscapeTicketItem_,
           print_preview.ticket_items.TicketItem.EventType.CHANGE,
@@ -66,11 +66,12 @@ cr.define('print_preview', function() {
     },
 
     /**
-     * @return {HTMLSelectElement} Select element containing the layout options.
+     * @return {!HTMLSelectElement} Select element containing the layout
+     *     options.
      * @private
      */
     get select_() {
-      return /** @type {HTMLSelectElement} */(
+      return /** @type {!HTMLSelectElement} */(

[dpapad, 2017/05/04 23:59:49]

Same here.

           this.getChildElement('.layout-settings-select'));
     },