Add missing call to SetUpOnMainThread to fix test crash

chrome/browser/notifications/login_state_notification_blocker_chromeos_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/shell.h"
 #include "ash/system/system_notifier.h"
 #include "base/command_line.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/user_adding_screen.h"
@@ skipping 21 matching lines @@
   virtual ~LoginStateNotificationBlockerChromeOSBrowserTest() {}
 
   // InProcessBrowserTest overrides:
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     LoginManagerTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(::switches::kMultiProfiles);
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     chromeos::LoginState::Get()->set_always_logged_in(false);
+    chromeos::LoginManagerTest::SetUpOnMainThread();
   }
 
   virtual void CleanUpOnMainThread() OVERRIDE {
     if (blocker_)
       blocker_->RemoveObserver(this);
     blocker_.reset();
     chromeos::LoginManagerTest::CleanUpOnMainThread();
   }
 
  protected:
@@ skipping 86 matching lines @@
   content::RunAllPendingInMessageLoop();
   EXPECT_EQ(1, GetStateChangedCountAndReset());
   EXPECT_TRUE(ShouldShowNotificationAsPopup(notifier_id));
 
   // Multi-login user switch off.
   chromeos::UserAddingScreen::Get()->Cancel();
   content::RunAllPendingInMessageLoop();
   EXPECT_EQ(1, GetStateChangedCountAndReset());
   EXPECT_TRUE(ShouldShowNotificationAsPopup(notifier_id));
 }