ash uber tray: Allow customizing each item depending on whether the user is logged in or not.

ash/system/user/login_status.h

Index: ash/system/user/login_status.h
diff --git a/ash/system/user/login_status.h b/ash/system/user/login_status.h
new file mode 100644
index 0000000000000000000000000000000000000000..df3e39d574e3dfae4b8b56e36218d88e52d24564
--- /dev/null
+++ b/ash/system/user/login_status.h
@@ -0,0 +1,21 @@
+// 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.
+
+#ifndef ASH_SYSTEM_USER_LOGIN_STATUS_H_
+#define ASH_SYSTEM_USER_LOGIN_STATUS_H_
+
+namespace ash {
+namespace user {
+
+enum LoginStatus {
+  LOGGED_IN_USER,   // A normal user is logged in.
+  LOGGED_IN_OWNER,  // The owner of the device is logged in.
+  LOGGED_IN_GUEST,  // A guest is logged in (i.e. incognito)
+  LOGGED_IN_NONE,   // Not logged in.
+};
+
+}  // namespace user
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_USER_LOGIN_STATUS_H_