[fsp] Decouple file_service_provider::Service.

chrome/browser/chromeos/file_system_provider/mount_path_util.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_MOUNT_PATH_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_MOUNT_PATH_UTIL_H_
+
+#include <string>
+
+class Profile;
+
+namespace base {
+class FilePath;
+}  // namespace base
+
+namespace chromeos {
+namespace file_system_provider {
+namespace util {
+
+// Constructs a safe mount point path for the provided file system.
+base::FilePath GetMountPointPath(Profile* profile,
+                                 std::string extension_id,
+                                 int file_system_id);
+
+}  // namespace util
+}  // namespace file_system_provider
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_MOUNT_PATH_UTIL_H_