Created new account type for ARC++ kiosk.

ash/system/chromeos/screen_layout_observer.cc

Index: ash/system/chromeos/screen_layout_observer.cc
diff --git a/ash/system/chromeos/screen_layout_observer.cc b/ash/system/chromeos/screen_layout_observer.cc
index 38cda20f996b45466f8e8bf1183c418c0b1ac4d4..56b04aaa7cc4e703d2c41b26c33bf398ffb0a970 100644
--- a/ash/system/chromeos/screen_layout_observer.cc
+++ b/ash/system/chromeos/screen_layout_observer.cc
@@ -78,11 +78,13 @@ bool OpenSettings() {
     case LoginStatus::PUBLIC:
     case LoginStatus::SUPERVISED:
     case LoginStatus::KIOSK_APP:
+    case LoginStatus::ARC_KIOSK_APP:
       SystemTrayDelegate* delegate = WmShell::Get()->system_tray_delegate();
       if (delegate->ShouldShowSettings()) {
         WmShell::Get()->system_tray_controller()->ShowDisplaySettings();
         return true;
       }
+      break;
   }
 
   return false;