Refactor kiosk app launch to be part of login screen UI flow.

chrome/browser/resources/chromeos/login/login.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview Login UI based on a stripped down OOBE controller.
  */
 
 <include src="login_common.js"></include>
 
@@ skipping 10 matching lines @@
       login.GaiaSigninScreen.register();
       login.UserImageScreen.register(/* lazyInit= */ true);
       login.ResetScreen.register();
       login.AutolaunchScreen.register();
       login.KioskEnableScreen.register();
       login.ErrorMessageScreen.register();
       login.TPMErrorMessageScreen.register();
       login.PasswordChangedScreen.register();
       login.LocallyManagedUserCreationScreen.register();
       login.TermsOfServiceScreen.register();
+      login.AppLaunchSplashScreen.register();
 
       cr.ui.Bubble.decorate($('bubble'));
       login.HeaderBar.decorate($('login-header-bar'));
 
       chrome.send('screenStateInitialize');
     },
 
     // Dummy Oobe functions not present with stripped login UI.
     initializeA11yMenu: function(e) {},
     handleAccessbilityLinkClick: function(e) {},
     handleSpokenFeedbackClick: function(e) {},
     handleHighContrastClick: function(e) {},
     handleScreenMagnifierClick: function(e) {},
     setUsageStats: function(checked) {},
     setOemEulaUrl: function(oemEulaUrl) {},
     setTpmPassword: function(password) {},
     refreshA11yInfo: function(data) {},
     reloadContent: function(data) {},
   };
 });