clang-tidy WaitableEvent refactor (ChromeOS side)

chromeos/system/statistics_provider.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/system/statistics_provider.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 359 matching lines @@
     *result = iter->second;
   return true;
 }
 
 void StatisticsProviderImpl::Shutdown() {
   cancellation_flag_.Set();  // Cancel any pending loads
 }
 
 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;
   regional_data_extractors_[kKeyboardLayoutKey] =
       &GetKeyboardLayoutFromRegionalData;
   regional_data_extractors_[kInitialTimezoneKey] =
       &GetInitialTimezoneFromRegionalData;
 }
 
 StatisticsProviderImpl::~StatisticsProviderImpl() {
@@ skipping 179 matching lines @@
   return StatisticsProviderImpl::GetInstance();
 }
 
 // static
 void StatisticsProvider::SetTestProvider(StatisticsProvider* test_provider) {
   g_test_statistics_provider = test_provider;
 }
 
 }  // namespace system
 }  // namespace chromeos