Migrate WaitableEvent to enum-based constructor in services/

services/shell/background/background_shell.cc

 // Copyright 2016 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 "services/shell/background/background_shell.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 133 matching lines @@
   thread_.reset(new MojoThread(std::move(init_params)));
   thread_->Start();
 }
 
 mojom::ShellClientRequest BackgroundShell::CreateShellClientRequest(
     const std::string& name) {
   std::unique_ptr<ConnectParams> params(new ConnectParams);
   params->set_source(CreateShellIdentity());
   params->set_target(Identity(name, mojom::kRootUserID));
   mojom::ShellClientRequest request;
-  base::WaitableEvent signal(true, false);
+  base::WaitableEvent signal(base::WaitableEvent::ResetPolicy::MANUAL,
+                             base::WaitableEvent::InitialState::NOT_SIGNALED);
   thread_->message_loop()->task_runner()->PostTask(
       FROM_HERE, base::Bind(&MojoThread::CreateShellClientRequest,
                             base::Unretained(thread_.get()), &signal, name,
                             &request));
   signal.Wait();
   thread_->message_loop()->task_runner()->PostTask(
       FROM_HERE, base::Bind(&MojoThread::Connect,
                             base::Unretained(thread_.get()),
                             base::Passed(&params)));
   return request;
 }
 
 void BackgroundShell::ExecuteOnShellThread(
     const ShellThreadCallback& callback) {
   thread_->message_loop()->task_runner()->PostTask(
       FROM_HERE, base::Bind(&MojoThread::RunShellCallback,
                             base::Unretained(thread_.get()), callback));
 }
 
 }  // namespace shell