[fsp] Introduce file_system_provider::Service class for the FileSystemProvider API.

chrome/browser/chromeos/file_system_provider/provided_file_system.h

+// Copyright 2014 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_H_
+
+#include <string>
+
+#include "base/files/file_path.h"
+
+namespace chromeos {
+namespace file_system_provider {
+
+struct ProvidedFileSystem {
+  // ID of the extension providing this file system.
+  std::string extension_id;
+
+  // ID of the file system, used internally. Equal to the mount point name of
+  // the underlying file system.
+  std::string file_system_id;
+
+  // Name of the file system, can be rendered in the UI.
+  std::string file_system_name;
+
+  // Mount path of the underlying file system.
+  base::FilePath mount_path;
+};
+
+}  // namespace file_system_provider
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_H_