Migrate WaitableEvent to enum-based constructor in base/

base/test/test_io_thread.cc

Index: base/test/test_io_thread.cc
diff --git a/base/test/test_io_thread.cc b/base/test/test_io_thread.cc
index 48c1e16531640e8990f5d6b8a3b6490cb0d4aa5b..1fa041251cbd9ed16b5b723f93954e07d4c8785a 100644
--- a/base/test/test_io_thread.cc
+++ b/base/test/test_io_thread.cc
@@ -56,7 +56,8 @@ void TestIOThread::PostTask(const tracked_objects::Location& from_here,
 
 void TestIOThread::PostTaskAndWait(const tracked_objects::Location& from_here,
                                    const base::Closure& task) {
-  base::WaitableEvent event(false, false);
+  base::WaitableEvent event(WaitableEvent::ResetPolicy::AUTOMATIC,
+                            WaitableEvent::InitialState::NOT_SIGNALED);
   task_runner()->PostTask(from_here,
                           base::Bind(&PostTaskAndWaitHelper, &event, task));
   event.Wait();