sync: Consistently refcount ModelSafeWorkers

sync/tools/sync_client.cc

Index: sync/tools/sync_client.cc
diff --git a/sync/tools/sync_client.cc b/sync/tools/sync_client.cc
index b0c9b5589b4e4dcb4202bef00f4e75bf01512371..a165f29fa84462a711873e762c2dc790a4c479ea 100644
--- a/sync/tools/sync_client.cc
+++ b/sync/tools/sync_client.cc
@@ -323,8 +323,8 @@ int SyncClientMain(int argc, char* argv[]) {
   }
   scoped_refptr<PassiveModelWorker> passive_model_safe_worker =
       new PassiveModelWorker(&sync_loop, NULL);
-  std::vector<ModelSafeWorker*> workers;
-  workers.push_back(passive_model_safe_worker.get());
+  std::vector<scoped_refptr<ModelSafeWorker> > workers;
+  workers.push_back(passive_model_safe_worker);
 
   // Set up sync manager.
   SyncManagerFactory sync_manager_factory;