mash: Add a simple, temporary preferences store.

components/filesystem/directory_impl.cc

 // Copyright 2015 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 "components/filesystem/directory_impl.h"
 
 #include <utility>
 
 #include "base/files/file.h"
 #include "base/files/file_enumerator.h"
@@ skipping 52 matching lines @@
   }
 
 #if defined(OS_WIN)
   // On Windows, FILE_FLAG_BACKUP_SEMANTICS is needed to open a directory.
   if (DirectoryExists(path))
     open_flags |= base::File::FLAG_BACKUP_SEMANTICS;
 #endif  // OS_WIN
 
   base::File base_file(path, open_flags);
   if (!base_file.IsValid()) {
-    callback.Run(FileError::FAILED);
+    callback.Run(GetError(base_file));
     return;
   }
 
   base::File::Info info;
   if (!base_file.GetInfo(&info)) {
     callback.Run(FileError::FAILED);
     return;
   }
 
   if (info.is_directory) {
@@ skipping 112 matching lines @@
     callback.Run(error, false);
     return;
   }
 
   callback.Run(FileError::OK, base::PathIsWritable(path));
 }
 
 void DirectoryImpl::Flush(const FlushCallback& callback) {
   base::File file(directory_path_, base::File::FLAG_READ);
   if (!file.IsValid()) {
-    callback.Run(FileError::FAILED);
+    callback.Run(GetError(file));
     return;
   }
 
   if (!file.Flush()) {
     callback.Run(FileError::FAILED);
     return;
   }
 
   callback.Run(FileError::OK);
 }
 
 }  // namespace filesystem