mojo: Fix leveldb unittests by making fs::Directories cloneable.

services/user/user_service.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/user/user_service.h"
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 10 matching lines @@
                          const scoped_refptr<filesystem::LockTable>& lock_table)
     : lock_table_(lock_table), path_(base_user_dir) {
   base::CreateDirectory(path_);
 }
 
 UserService::~UserService() {}
 
 void UserService::GetDirectory(filesystem::DirectoryRequest request,
                                const GetDirectoryCallback& callback) {
   new filesystem::DirectoryImpl(std::move(request), path_,
-                                std::unique_ptr<base::ScopedTempDir>(),
+                                scoped_refptr<filesystem::SharedTempDir>(),
                                 lock_table_);
   callback.Run();
 }
 
 void UserService::GetSubDirectory(const mojo::String& sub_directory_path,
                                   filesystem::DirectoryRequest request,
                                   const GetSubDirectoryCallback& callback) {
   // Ensure that we've made |subdirectory| recursively under our user dir.
   base::FilePath subdir = path_.Append(
 #if defined(OS_WIN)
       base::UTF8ToWide(sub_directory_path.To<std::string>()));
 #else
       sub_directory_path.To<std::string>());
 #endif
   base::File::Error error;
   if (!base::CreateDirectoryAndGetError(subdir, &error)) {
     callback.Run(static_cast<filesystem::FileError>(error));
     return;
   }
 
   new filesystem::DirectoryImpl(std::move(request), subdir,
-                                std::unique_ptr<base::ScopedTempDir>(),
+                                scoped_refptr<filesystem::SharedTempDir>(),
                                 lock_table_);
   callback.Run(filesystem::FileError::OK);
 }
 
 }  // namespace user_service