Fix the flaky test KioskTest.LaunchAppUserCancel

chrome/browser/chromeos/login/app_launch_signin_screen.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 "chrome/browser/chromeos/login/app_launch_signin_screen.h"
 
 #include "base/values.h"
 #include "chrome/browser/chromeos/login/help_app_launcher.h"
 #include "chrome/browser/chromeos/login/screens/user_selection_screen.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
@@ skipping 141 matching lines @@
 }
 
 bool AppLaunchSigninScreen::IsShowGuest() const {
   return false;
 }
 
 bool AppLaunchSigninScreen::IsShowUsers() const {
   return true;
 }
 
+bool AppLaunchSigninScreen::ShowUsersHasChanged() const {
+  return false;
+}
+
+bool AppLaunchSigninScreen::IsAllowNewUser() const {
+  return true;
+}
+
+bool AppLaunchSigninScreen::AllowNewUserChanged() const {
+  return false;
+}
+
 bool AppLaunchSigninScreen::IsSigninInProgress() const {
   // Return true to suppress network processing in the signin screen.
   return true;
 }
 
 bool AppLaunchSigninScreen::IsUserSigninCompleted() const {
   return false;
 }
 
 void AppLaunchSigninScreen::SetDisplayEmail(const std::string& email) {
@@ skipping 42 matching lines @@
 }
 
 void AppLaunchSigninScreen::CheckUserStatus(const AccountId& account_id) {}
 
 bool AppLaunchSigninScreen::IsUserWhitelisted(const AccountId& account_id) {
   NOTREACHED();
   return true;
 }
 
 }  // namespace chromeos