Re-write many calls to WrapUnique() with MakeUnique()

remoting/host/pairing_registry_delegate_linux.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 "remoting/host/pairing_registry_delegate_linux.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_enumerator.h"
@@ skipping 141 matching lines @@
   base::FilePath config_dir = remoting::GetConfigDir();
   return config_dir.Append(kRegistryDirectory);
 }
 
 void PairingRegistryDelegateLinux::SetRegistryPathForTesting(
     const base::FilePath& registry_path) {
   registry_path_for_testing_ = registry_path;
 }
 
 std::unique_ptr<PairingRegistry::Delegate> CreatePairingRegistryDelegate() {
-  return base::WrapUnique(new PairingRegistryDelegateLinux());
+  return base::MakeUnique<PairingRegistryDelegateLinux>();
 }
 
 }  // namespace remoting