Revert of MD Settings: Elim SettingsSubpageBrowsertest and SettingsPageVisibility

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

Index: chrome/test/data/webui/settings/on_startup_browsertest.js
diff --git a/chrome/test/data/webui/settings/on_startup_browsertest.js b/chrome/test/data/webui/settings/on_startup_browsertest.js
index 14ae3d48d638d594e4365663f4eb3f111e480778..76546308ffa179e09c76104aba22b2b9231b2f82 100644
--- a/chrome/test/data/webui/settings/on_startup_browsertest.js
+++ b/chrome/test/data/webui/settings/on_startup_browsertest.js
@@ -40,6 +40,7 @@
   /** @override */
   preLoad: function() {
     SettingsPageBrowserTest.prototype.preLoad.call(this);
+    settingsHidePagesByDefaultForTest = true;
   },
 };
 
@@ -58,6 +59,9 @@
 
   suite('OnStartupHandler', function() {
     suiteSetup(function() {
+      self.basicPage.set('pageVisibility.onStartup', true);
+      Polymer.dom.flush();
+
       settingsPrefs = document.querySelector('settings-ui').$$(
           'settings-prefs');
       assertTrue(!!settingsPrefs);