Revert of [Sync] Stop accessing BrowserContextKeyedServiceFactory on non-UI thread.

chrome/browser/extensions/api/storage/settings_apitest.cc

Index: chrome/browser/extensions/api/storage/settings_apitest.cc
diff --git a/chrome/browser/extensions/api/storage/settings_apitest.cc b/chrome/browser/extensions/api/storage/settings_apitest.cc
index 07ea411f58564fcd383ee46f8dec076445ddcfbe..e0c56008abffb2bb5f8f83037da5a3fc9937b950 100644
--- a/chrome/browser/extensions/api/storage/settings_apitest.cc
+++ b/chrome/browser/extensions/api/storage/settings_apitest.cc
@@ -113,10 +113,8 @@
   }
 
   syncer::SyncableService* GetSyncableService() {
-    return settings_sync_util::GetSyncableServiceProvider(browser()->profile(),
-                                                          kModelType)
-        .Run()
-        .get();
+    return settings_sync_util::GetSyncableService(browser()->profile(),
+                                                  kModelType);
   }
 
   void InitSync(syncer::SyncChangeProcessor* sync_processor) {