Migrate WaitableEvent to enum-based constructor in base/

base/task_scheduler/task_scheduler_impl.cc

Index: base/task_scheduler/task_scheduler_impl.cc
diff --git a/base/task_scheduler/task_scheduler_impl.cc b/base/task_scheduler/task_scheduler_impl.cc
index 03d0906980062cd0d8a2952fd74c68e991a2770d..e46a5b42977288fe6f9afb1c4c1b0d78c442473c 100644
--- a/base/task_scheduler/task_scheduler_impl.cc
+++ b/base/task_scheduler/task_scheduler_impl.cc
@@ -68,11 +68,12 @@ void TaskSchedulerImpl::JoinForTesting() {
 }
 
 TaskSchedulerImpl::TaskSchedulerImpl()
-    : delayed_task_manager_(Bind(&TaskSchedulerImpl::OnDelayedRunTimeUpdated,
-                                 Unretained(this)))
+    : delayed_task_manager_(
+          Bind(&TaskSchedulerImpl::OnDelayedRunTimeUpdated, Unretained(this)))
 #if DCHECK_IS_ON()
-          ,
-      join_for_testing_returned_(true, false)
+      ,
+      join_for_testing_returned_(WaitableEvent::ResetPolicy::MANUAL,
+                                 WaitableEvent::InitialState::NOT_SIGNALED)
 #endif
 {
 }