MD Settings: Fix Advanced Toggle when on an Advanced section route.

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

Index: chrome/test/data/webui/settings/settings_main_test.js
diff --git a/chrome/test/data/webui/settings/settings_main_test.js b/chrome/test/data/webui/settings/settings_main_test.js
index efd6eab99a7fbfd339d2dc9ffe29b9d552b6fe3b..b9b357d5cfbc950065c0d2f5dca19776c271d1dd 100644
--- a/chrome/test/data/webui/settings/settings_main_test.js
+++ b/chrome/test/data/webui/settings/settings_main_test.js
@@ -50,6 +50,7 @@ cr.define('settings_main_page', function() {
       var settingsMain = null;
 
       setup(function() {
+        settings.navigateTo(settings.Route.BASIC);
         searchManager = new TestSearchManager();
         settings.setSearchManagerForTesting(searchManager);
         PolymerTest.clearBody();
@@ -122,6 +123,19 @@ cr.define('settings_main_page', function() {
               'none', settingsMain.$$('settings-advanced-page').style.display);
         });
       });
+
+      test('can collapse advanced on advanced section route', function() {
+        settings.navigateTo(settings.Route.PRIVACY);
+        Polymer.dom.flush();
+
+        var advancedToggle = settingsMain.$$('#advancedToggle');
+        assertTrue(!!advancedToggle);
+
+        MockInteractions.tap(advancedToggle);
+        Polymer.dom.flush();
+
+        assertFalse(settingsMain.showPages_.advanced);
+      });
     });
   }