Migrate WaitableEvent to enum-based constructor in base/

base/task_scheduler/scheduler_worker_thread_unittest.cc

Index: base/task_scheduler/scheduler_worker_thread_unittest.cc
diff --git a/base/task_scheduler/scheduler_worker_thread_unittest.cc b/base/task_scheduler/scheduler_worker_thread_unittest.cc
index 9fb1ecc49d7ffe2b9b6a5a177319c16f37d336d3..88d9b23c8f2a5199d45245cd67a10df4752a12e5 100644
--- a/base/task_scheduler/scheduler_worker_thread_unittest.cc
+++ b/base/task_scheduler/scheduler_worker_thread_unittest.cc
@@ -31,9 +31,11 @@ const size_t kNumSequencesPerTest = 150;
 class TaskSchedulerWorkerThreadTest : public testing::TestWithParam<size_t> {
  protected:
   TaskSchedulerWorkerThreadTest()
-      : main_entry_called_(true, false),
+      : main_entry_called_(WaitableEvent::ResetPolicy::MANUAL,
+                           WaitableEvent::InitialState::NOT_SIGNALED),
         num_get_work_cv_(lock_.CreateConditionVariable()),
-        worker_thread_set_(true, false) {}
+        worker_thread_set_(WaitableEvent::ResetPolicy::MANUAL,
+                           WaitableEvent::InitialState::NOT_SIGNALED) {}
 
   void SetUp() override {
     worker_thread_ = SchedulerWorkerThread::Create(