ash: Use SessionController instead of SessionStateDelegate

ash/common/system/web_notification/web_notification_tray.cc

Index: ash/common/system/web_notification/web_notification_tray.cc
diff --git a/ash/common/system/web_notification/web_notification_tray.cc b/ash/common/system/web_notification/web_notification_tray.cc
index 28f6586be82710dbf3b58a24f5bd06b4f987ef5c..c0a3dd19c6ec4fdb80c91cb3751a2fed11719736 100644
--- a/ash/common/system/web_notification/web_notification_tray.cc
+++ b/ash/common/system/web_notification/web_notification_tray.cc
@@ -4,7 +4,7 @@
 
 #include "ash/common/system/web_notification/web_notification_tray.h"
 
-#include "ash/common/session/session_state_delegate.h"
+#include "ash/common/session/session_controller.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shelf/wm_shelf_util.h"
@@ -616,7 +616,7 @@ bool WebNotificationTray::IsLoggedIn() const {
   WmShell* shell = WmShell::Get();
   return shell->system_tray_delegate()->GetUserLoginStatus() !=
              LoginStatus::NOT_LOGGED_IN &&
-         !shell->GetSessionStateDelegate()->IsInSecondaryLoginScreen();
+         !shell->session_controller()->IsInSecondaryLoginScreen();
 }
 
 // Methods for testing