Enables internal filesystem types via Isolated filesystems

webkit/fileapi/local_file_system_test_helper.h

 // Copyright (c) 2012 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_LOCAL_FILE_SYSTEM_TEST_HELPER_H_
 #define WEBKIT_FILEAPI_LOCAL_FILE_SYSTEM_TEST_HELPER_H_
 
 #include <string>
 
 #include "base/file_path.h"
@@ skipping 11 matching lines @@
 class FilePath;
 
 namespace fileapi {
 
 class FileSystemContext;
 class FileSystemFileUtil;
 class FileSystemOperationContext;
 class LocalFileSystemOperation;
 
 // Filesystem test helper class that encapsulates test environment for
-// a given {origin, type} pair.
+// a given {origin, type} pair.  This helper only works for sandboxed
+// file systems (Temporary, Persistent or Test types).
 class LocalFileSystemTestOriginHelper {
  public:
   LocalFileSystemTestOriginHelper(const GURL& origin, FileSystemType type);
   LocalFileSystemTestOriginHelper();
   ~LocalFileSystemTestOriginHelper();
 
   void SetUp(const FilePath& base_dir, FileSystemFileUtil* file_util);
   // If you want to use more than one LocalFileSystemTestOriginHelper in
   // a single base directory, they have to share a context, so that they don't
   // have multiple databases fighting over the lock to the origin directory
@@ skipping 53 matching lines @@
  private:
   scoped_refptr<FileSystemContext> file_system_context_;
   const GURL origin_;
   const FileSystemType type_;
   FileSystemFileUtil* file_util_;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_LOCAL_FILE_SYSTEM_TEST_HELPER_H_