clang-tidy WaitableEvent refactor (Android side)

chrome/browser/android/provider/blocking_ui_thread_async_request.cc

 // Copyright (c) 2012 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 "chrome/browser/android/provider/blocking_ui_thread_async_request.h"
 
 BlockingUIThreadAsyncRequest::BlockingUIThreadAsyncRequest()
-    : request_completed_(false, false) {
-}
+    : request_completed_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                         base::WaitableEvent::InitialState::NOT_SIGNALED) {}
 
 void BlockingUIThreadAsyncRequest::RequestCompleted() {
   // Currently all our use cases receive their request response in the UI
   // thread (the same thread that made the request). However this is not
   // a design constraint and can be changed if ever needed.
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   request_completed_.Signal();
 }