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

ash/system/tray/default_system_tray_delegate.cc

Index: ash/system/tray/default_system_tray_delegate.cc
diff --git a/ash/system/tray/default_system_tray_delegate.cc b/ash/system/tray/default_system_tray_delegate.cc
index fd315d6b3a4e877f11d00ea31bbf93afda4d6188..75513a746f38ed6bb3affb1483401f598f26ff3b 100644
--- a/ash/system/tray/default_system_tray_delegate.cc
+++ b/ash/system/tray/default_system_tray_delegate.cc
@@ -26,8 +26,8 @@ bool DefaultSystemTrayDelegate::GetTrayVisibilityOnStartup() {
   return true;
 }
 
-user::LoginStatus DefaultSystemTrayDelegate::GetUserLoginStatus() const {
-  return user::LOGGED_IN_USER;
+LoginStatus DefaultSystemTrayDelegate::GetUserLoginStatus() const {
+  return LoginStatus::USER;
 }
 
 std::string DefaultSystemTrayDelegate::GetSupervisedUserManager() const {
@@ -37,7 +37,7 @@ std::string DefaultSystemTrayDelegate::GetSupervisedUserManager() const {
 }
 
 bool DefaultSystemTrayDelegate::IsUserSupervised() const {
-  return GetUserLoginStatus() == ash::user::LOGGED_IN_SUPERVISED;
+  return GetUserLoginStatus() == LoginStatus::SUPERVISED;
 }
 
 void DefaultSystemTrayDelegate::GetSystemUpdateInfo(UpdateInfo* info) const {