Simplifed logic of showing/hiding cancel buttons on login screens.

chrome/browser/chromeos/login/login_ui_keyboard_browsertest.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/input_method/input_method_persistence.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
@@ skipping 250 matching lines @@
             input_method::InputMethodManager::Get()
                 ->GetActiveIMEState()
                 ->GetActiveInputMethodIds());
 
   // Switch to Gaia.
   js_checker().Evaluate("$('add-user-button').click()");
   OobeScreenWaiter(OobeDisplay::SCREEN_GAIA_SIGNIN).Wait();
   CheckGaiaKeyboard();
 
   // Switch back.
-  js_checker().Evaluate("$('cancel-add-user-button').click()");
+  js_checker().Evaluate("$('gaia-signin').cancel()");
   OobeScreenWaiter(OobeDisplay::SCREEN_ACCOUNT_PICKER).Wait();
 
   EXPECT_EQ(expected_input_methods,
             input_method::InputMethodManager::Get()
                 ->GetActiveIMEState()
                 ->GetActiveInputMethodIds());
 }
 }  // namespace chromeos