Moves ash::user::LoginStatus to ash/common

ash/system/overview/overview_button_tray.cc

Index: ash/system/overview/overview_button_tray.cc
diff --git a/ash/system/overview/overview_button_tray.cc b/ash/system/overview/overview_button_tray.cc
index b226fcd9f8747eec52bf3a63a4493a9fec615656..dc8a9293aa351294b8425fcabf8bd2fb79e17f38 100644
--- a/ash/system/overview/overview_button_tray.cc
+++ b/ash/system/overview/overview_button_tray.cc
@@ -54,8 +54,7 @@ OverviewButtonTray::~OverviewButtonTray() {
       this);
 }
 
-void OverviewButtonTray::UpdateAfterLoginStatusChange(
-    user::LoginStatus status) {
+void OverviewButtonTray::UpdateAfterLoginStatusChange(LoginStatus status) {
   UpdateIconVisibility();
 }
 
@@ -136,7 +135,7 @@ void OverviewButtonTray::UpdateIconVisibility() {
       session_state_delegate->GetSessionState() ==
           SessionStateDelegate::SESSION_STATE_ACTIVE &&
       shell->system_tray_delegate()->GetUserLoginStatus() !=
-          user::LOGGED_IN_KIOSK_APP);
+          LoginStatus::KIOSK_APP);
 }
 
 }  // namespace ash