DO NOT COMMIT (will be split in sub-components) - clang-tidy WaitableEvent refactor

media/audio/scoped_task_runner_observer.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 "media/audio/scoped_task_runner_observer.h"
 
 #include "base/bind.h"
 #include "base/synchronization/waitable_event.h"
 
 namespace media {
@@ skipping 13 matching lines @@
     base::WaitableEvent* done) {
   // Note: |done| may be NULL.
   if (task_runner_->BelongsToCurrentThread()) {
     base::MessageLoop* loop = base::MessageLoop::current();
     if (enable) {
       loop->AddDestructionObserver(this);
     } else {
       loop->RemoveDestructionObserver(this);
     }
   } else {
-    base::WaitableEvent event(false, false);
+    base::WaitableEvent event(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                              base::WaitableEvent::InitialState::NOT_SIGNALED);
     if (task_runner_->PostTask(FROM_HERE,
             base::Bind(&ScopedTaskRunnerObserver::ObserveLoopDestruction,
                        base::Unretained(this), enable, &event))) {
       event.Wait();
     } else {
       // The message loop's thread has already terminated, so no need to wait.
     }
   }
 
   if (done)
     done->Signal();
 }
 
 }  // namespace media.