Settings Sync: Fix CloseUI logic in both Settings and MD Settings.

chrome/browser/ui/webui/options/sync_setup_handler.cc

Index: chrome/browser/ui/webui/options/sync_setup_handler.cc
diff --git a/chrome/browser/ui/webui/options/sync_setup_handler.cc b/chrome/browser/ui/webui/options/sync_setup_handler.cc
index 3462aee7e2f2215356b099492a0cf0cb8e17b0c5..458a8c7410d678229b9a98473174b27c8a62dcdd 100644
--- a/chrome/browser/ui/webui/options/sync_setup_handler.cc
+++ b/chrome/browser/ui/webui/options/sync_setup_handler.cc
@@ -719,10 +719,12 @@ void SyncSetupHandler::CloseSyncSetup() {
         }
       }
     }
-
-    GetLoginUIService()->LoginUIClosed(this);
   }
 
+  LoginUIService* service = GetLoginUIService();
+  if (service)
+    service->LoginUIClosed(this);
+
   // Alert the sync service anytime the sync setup dialog is closed. This can
   // happen due to the user clicking the OK or Cancel button, or due to the
   // dialog being closed by virtue of sync being disabled in the background.