MD Settings: Simplify settings-dropdown-menu

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

Index: chrome/test/data/webui/settings/cr_settings_browsertest.js
diff --git a/chrome/test/data/webui/settings/cr_settings_browsertest.js b/chrome/test/data/webui/settings/cr_settings_browsertest.js
index 848814cc9c633cca691f970121792a05c2b7ee12..557ab9dea80b12da83dd176c8f3f50f63f7e5cc2 100644
--- a/chrome/test/data/webui/settings/cr_settings_browsertest.js
+++ b/chrome/test/data/webui/settings/cr_settings_browsertest.js
@@ -29,6 +29,7 @@ CrSettingsBrowserTest.prototype = {
   /** @override */
   extraLibraries: PolymerTest.getLibraries(ROOT_PATH).concat([
     'checkbox_tests.js',
+    'dropdown_menu_tests.js',
     'pref_util_tests.js',
     'prefs_test_cases.js',
     'prefs_tests.js',
@@ -49,6 +50,7 @@ GEN('#endif');
 TEST_F('CrSettingsBrowserTest', 'MAYBE_CrSettingsTest', function() {
   // Register mocha tests for each element.
   settings_checkbox.registerTests();
+  settings_dropdown_menu.registerTests();
   settings_prefUtil.registerTests();
   settings_prefs.registerTests();