ash: Use session_manager::SessionState

ash/common/shelf/shelf_layout_manager.cc

Index: ash/common/shelf/shelf_layout_manager.cc
diff --git a/ash/common/shelf/shelf_layout_manager.cc b/ash/common/shelf/shelf_layout_manager.cc
index 6bec096c7187b0ce9a20f8d4c732ddefc54ee98a..fa4990343d175e78d44f0e6d85449e2f9cc33d4e 100644
--- a/ash/common/shelf/shelf_layout_manager.cc
+++ b/ash/common/shelf/shelf_layout_manager.cc
@@ -968,11 +968,10 @@ void ShelfLayoutManager::OnLockStateEvent(LockStateObserver::EventType event) {
   }
 }
 
-void ShelfLayoutManager::SessionStateChanged(
-    SessionStateDelegate::SessionState state) {
+void ShelfLayoutManager::SessionStateChanged(SessionState state) {
   // Check transition changes to/from the add user to session and change the
   // shelf alignment accordingly
-  bool add_user = state == SessionStateDelegate::SESSION_STATE_LOGIN_SECONDARY;
+  const bool add_user = state == SessionState::LOGIN_SECONDARY;
   if (add_user != state_.is_adding_user_screen) {
     state_.is_adding_user_screen = add_user;
     UpdateShelfVisibilityAfterLoginUIChange();