First step to refactor ServiceWorkerVersion to make event dispatching more modular.

content/browser/service_worker/service_worker_test_utils.h

Index: content/browser/service_worker/service_worker_test_utils.h
diff --git a/content/browser/service_worker/service_worker_test_utils.h b/content/browser/service_worker/service_worker_test_utils.h
index 5bb72c9e1057ab41c148bd8b7cd3d6d70c84ad66..9e3983baa59ff5e0f5350993578b8aa1717af0c1 100644
--- a/content/browser/service_worker/service_worker_test_utils.h
+++ b/content/browser/service_worker/service_worker_test_utils.h
@@ -26,12 +26,14 @@ CreateReceiver(BrowserThread::ID run_quit_thread,
   return base::Bind(&ReceiveResult<Arg>, run_quit_thread, quit, out);
 }
 
-template <typename Arg> base::Callback<void(Arg)>
-CreateReceiverOnCurrentThread(Arg* out) {
+template <typename Arg>
+base::Callback<void(Arg)> CreateReceiverOnCurrentThread(
+    Arg* out,
+    const base::Closure& quit = base::Closure()) {
   BrowserThread::ID id;
   bool ret = BrowserThread::GetCurrentThreadIdentifier(&id);
   DCHECK(ret);
-  return base::Bind(&ReceiveResult<Arg>, id, base::Closure(), out);
+  return base::Bind(&ReceiveResult<Arg>, id, quit, out);
 }
 
 }  // namespace content