clang-tidy WaitableEvent refactor (ChromeOS side)

chromeos/system/statistics_provider.cc

Index: chromeos/system/statistics_provider.cc
diff --git a/chromeos/system/statistics_provider.cc b/chromeos/system/statistics_provider.cc
index 4c8bf1fd79eee539012bab7003c507afe75fe586..18c697681aa5e6ff66a2578d14a6db441b2bcc91 100644
--- a/chromeos/system/statistics_provider.cc
+++ b/chromeos/system/statistics_provider.cc
@@ -377,8 +377,8 @@ void StatisticsProviderImpl::Shutdown() {
 
 StatisticsProviderImpl::StatisticsProviderImpl()
     : load_statistics_started_(false),
-      on_statistics_loaded_(true  /* manual_reset */,
-                            false /* initially_signaled */),
+      on_statistics_loaded_(base::WaitableEvent::ResetPolicy::MANUAL,
+                            base::WaitableEvent::InitialState::NOT_SIGNALED),
       oem_manifest_loaded_(false) {
   regional_data_extractors_[kInitialLocaleKey] =
       &GetInitialLocaleFromRegionalData;