More WaitableEvent stragglers migrated to enum-based constructor

ui/ozone/platform/drm/gpu/proxy_helpers.cc

Index: ui/ozone/platform/drm/gpu/proxy_helpers.cc
diff --git a/ui/ozone/platform/drm/gpu/proxy_helpers.cc b/ui/ozone/platform/drm/gpu/proxy_helpers.cc
index 556280d9b625fd59bb0c5fa6d54dc0f17c82b7a6..60bc23f75ea0239b700c243e4b174cad454ed174 100644
--- a/ui/ozone/platform/drm/gpu/proxy_helpers.cc
+++ b/ui/ozone/platform/drm/gpu/proxy_helpers.cc
@@ -21,7 +21,8 @@ void OnRunPostedTaskAndSignal(const base::Closure& callback,
 void PostSyncTask(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     const base::Closure& callback) {
-  base::WaitableEvent wait(false, false);
+  base::WaitableEvent wait(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                           base::WaitableEvent::InitialState::NOT_SIGNALED);
   bool success = task_runner->PostTask(
       FROM_HERE, base::Bind(OnRunPostedTaskAndSignal, callback, &wait));
   if (success)