arc: Add splash screen for ARC++ Kiosk startup

ui/login/display_manager.js

Index: ui/login/display_manager.js
diff --git a/ui/login/display_manager.js b/ui/login/display_manager.js
index 5ca41e2fd8983efed10bd1eb9193db919fd2bbd8..843b926db92568992abdd1a30d68337a3522ee6f 100644
--- a/ui/login/display_manager.js
+++ b/ui/login/display_manager.js
@@ -25,6 +25,7 @@
 /** @const */ var SCREEN_CREATE_SUPERVISED_USER_FLOW =
     'supervised-user-creation';
 /** @const */ var SCREEN_APP_LAUNCH_SPLASH = 'app-launch-splash';
+/** @const */ var SCREEN_ARC_KIOSK_SPLASH = 'arc-kiosk-splash';
 /** @const */ var SCREEN_CONFIRM_PASSWORD = 'confirm-password';
 /** @const */ var SCREEN_FATAL_ERROR = 'fatal-error';
 /** @const */ var SCREEN_KIOSK_ENABLE = 'kiosk-enable';
@@ -87,6 +88,7 @@
   LOCK: 'lock',
   USER_ADDING: 'user-adding',
   APP_LAUNCH_SPLASH: 'app-launch-splash',
+  ARC_KIOSK_SPLASH: 'arc-kiosk-splash',
   DESKTOP_USER_MANAGER: 'login-add-user'
 };
 
@@ -385,6 +387,8 @@ cr.define('cr.ui.login', function() {
       } else if (name == ACCELERATOR_APP_LAUNCH_BAILOUT) {
         if (currentStepId == SCREEN_APP_LAUNCH_SPLASH)
           chrome.send('cancelAppLaunch');
+        if (currentStepId == SCREEN_ARC_KIOSK_SPLASH)
+          chrome.send('cancelArcKioskLaunch');
       } else if (name == ACCELERATOR_APP_LAUNCH_NETWORK_CONFIG) {
         if (currentStepId == SCREEN_APP_LAUNCH_SPLASH)
           chrome.send('networkConfigRequest');