MD Settings: Replace paper-menu with paper-listbox in a few places.

chrome/test/data/webui/settings/dropdown_menu_tests.js

Index: chrome/test/data/webui/settings/dropdown_menu_tests.js
diff --git a/chrome/test/data/webui/settings/dropdown_menu_tests.js b/chrome/test/data/webui/settings/dropdown_menu_tests.js
index f3531e5327c29ba36f9233907c8516c86d14219a..07eb041532c9183788c346ab23c2f3a5ad6d125a 100644
--- a/chrome/test/data/webui/settings/dropdown_menu_tests.js
+++ b/chrome/test/data/webui/settings/dropdown_menu_tests.js
@@ -19,7 +19,8 @@ cr.define('settings_dropdown_menu', function() {
       var dropdown;
 
       /**
-       * The IronSelectable (paper-menu) used internally by the dropdown menu.
+       * The IronSelectable (paper-listbox) used internally by the dropdown
+       * menu.
        * @type {Polymer.IronSelectableBehavior}
        */
       var selectable;
@@ -27,7 +28,7 @@ cr.define('settings_dropdown_menu', function() {
       setup(function() {
         PolymerTest.clearBody();
         dropdown = document.createElement('settings-dropdown-menu');
-        selectable = dropdown.$$('paper-menu');
+        selectable = dropdown.$$('paper-listbox');
         document.body.appendChild(dropdown);
       });