ash: Use session_manager::SessionState

ash/common/system/overview/overview_button_tray.cc

Index: ash/common/system/overview/overview_button_tray.cc
diff --git a/ash/common/system/overview/overview_button_tray.cc b/ash/common/system/overview/overview_button_tray.cc
index 672798967666d5cc1d5ad27d7c20619bf4809387..c6fcc3abcbf0efb125ad45e5501d48c0d2451b94 100644
--- a/ash/common/system/overview/overview_button_tray.cc
+++ b/ash/common/system/overview/overview_button_tray.cc
@@ -77,8 +77,7 @@ bool OverviewButtonTray::PerformAction(const ui::Event& event) {
   return true;
 }
 
-void OverviewButtonTray::SessionStateChanged(
-    SessionStateDelegate::SessionState state) {
+void OverviewButtonTray::SessionStateChanged(SessionState state) {
   UpdateIconVisibility();
 }
 
@@ -144,8 +143,7 @@ void OverviewButtonTray::UpdateIconVisibility() {
       shell->maximize_mode_controller()->IsMaximizeModeWindowManagerEnabled() &&
       session_state_delegate->IsActiveUserSessionStarted() &&
       !session_state_delegate->IsScreenLocked() &&
-      session_state_delegate->GetSessionState() ==
-          SessionStateDelegate::SESSION_STATE_ACTIVE &&
+      session_state_delegate->GetSessionState() == SessionState::ACTIVE &&
       shell->system_tray_delegate()->GetUserLoginStatus() !=
           LoginStatus::KIOSK_APP);
 }