[Refactor] to rename and re-layer the file_util stack layers.

webkit/fileapi/file_system_mount_point_provider.h

 // Copyright (c) 2011 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 WEBKIT_FILEAPI_FILE_SYSTEM_MOUNT_POINT_PROVIDER_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_MOUNT_POINT_PROVIDER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 34 matching lines @@
 
   // Checks if a given |name| contains any restricted names/chars in it.
   // Callable on any thread.
   virtual bool IsRestrictedFileName(const FilePath& filename) const = 0;
 
   // Returns the list of top level directories that are exposed by this
   // provider. This list is used to set appropriate child process file access
   // permissions.
   virtual std::vector<FilePath> GetRootDirectories() const = 0;
 
-  virtual FileSystemFileUtil* GetFileSystemFileUtil() = 0;
+  virtual FileSystemFileUtil* GetFileUtil() = 0;
 };
 
 // An interface to control external file system access permissions.
 class ExternalFileSystemMountPointProvider
     : public FileSystemMountPointProvider {
  public:
   // Grant access to all external file system from extension identified with
   // |extension_id|.
   virtual void GrantFullAccessToExtension(const std::string& extension_id) = 0;
   // Grants access to |virtual_path| from |origin_url|.
   virtual void GrantFileAccessToExtension(
       const std::string& extension_id,
       const FilePath& virtual_path) = 0;
   // Revoke file access from extension identified with |extension_id|.
   virtual void RevokeAccessForExtension(
         const std::string& extension_id) = 0;
   // Adds a new mount point.
   virtual void AddMountPoint(FilePath mount_point) = 0;
   // Remove a mount point.
   virtual void RemoveMountPoint(FilePath mount_point) = 0;
   // Gets virtual path by known filesystem path. Returns false when filesystem
   // path is not exposed by this provider.
   virtual bool GetVirtualPath(const FilePath& filesystem_path,
                               FilePath* virtual_path) = 0;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_MOUNT_POINT_PROVIDER_H_