Migrate WaitableEvent to enum-based constructor in sync/

sync/internal_api/public/engine/model_safe_worker.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 "sync/internal_api/public/engine/model_safe_worker.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
@@ skipping 56 matching lines @@
     case GROUP_NON_BLOCKING:
       return "GROUP_NON_BLOCKING";
     default:
       NOTREACHED();
       return "INVALID";
   }
 }
 
 ModelSafeWorker::ModelSafeWorker(WorkerLoopDestructionObserver* observer)
     : stopped_(false),
-      work_done_or_stopped_(false, false),
+      work_done_or_stopped_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                            base::WaitableEvent::InitialState::NOT_SIGNALED),
       observer_(observer),
-      working_loop_(NULL) {
-}
+      working_loop_(NULL) {}
 
 ModelSafeWorker::~ModelSafeWorker() {}
 
 void ModelSafeWorker::RequestStop() {
   base::AutoLock al(stopped_lock_);
 
   // Set stop flag but don't signal work_done_or_stopped_ to unblock sync loop
   // because the worker may be working and depending on sync command object
   // living on sync thread. This prevents any *further* tasks from being posted
   // to worker threads (see DoWorkAndWaitUntilDone below), but note that one
@@ skipping 101 matching lines @@
       return;
     DCHECK_EQ(base::MessageLoop::current(), working_loop_);
   }
 
   DCHECK(stopped_);
   base::MessageLoop::current()->RemoveDestructionObserver(this);
   unregister_done_callback.Run(GetModelSafeGroup());
 }
 
 }  // namespace syncer