diff -r 000000000000 -r 6474c204b198 dom/filesystem/FileSystemBase.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/filesystem/FileSystemBase.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_FileSystemBase_h
+#define mozilla_dom_FileSystemBase_h
+
+#include "nsAutoPtr.h"
+#include "nsString.h"
+
+class nsIDOMFile;
+class nsPIDOMWindow;
+
+namespace mozilla {
+namespace dom {
+
+class Directory;
+
+class FileSystemBase
+{
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FileSystemBase)
+public:
+
+  // Create file system object from its string representation.
+  static already_AddRefed<FileSystemBase>
+  FromString(const nsAString& aString);
+
+  FileSystemBase();
+
+  virtual void
+  Shutdown();
+
+  // Get the string representation of the file system.
+  const nsString&
+  ToString() const
+  {
+    return mString;
+  }
+
+  virtual nsPIDOMWindow*
+  GetWindow() const;
+
+  /*
+   * Create nsIFile object with the given real path (absolute DOM path).
+   */
+  virtual already_AddRefed<nsIFile>
+  GetLocalFile(const nsAString& aRealPath) const = 0;
+
+  /*
+   * Get the virtual name of the root directory. This name will be exposed to
+   * the content page.
+   */
+  virtual const nsAString&
+  GetRootName() const = 0;
+
+  bool
+  IsShutdown() const
+  {
+    return mShutdown;
+  }
+
+  virtual bool
+  IsSafeFile(nsIFile* aFile) const;
+
+  virtual bool
+  IsSafeDirectory(Directory* aDir) const;
+
+  /*
+   * Get the real path (absolute DOM path) of the DOM file in the file system.
+   * If succeeded, returns true. Otherwise, returns false and set aRealPath to
+   * empty string.
+   */
+  virtual bool
+  GetRealPath(nsIDOMFile* aFile, nsAString& aRealPath) const = 0;
+
+  /*
+   * Get the permission name required to access this file system.
+   */
+  const nsCString&
+  GetPermission() const
+  {
+    return mPermission;
+  }
+
+  bool
+  IsTesting() const
+  {
+    return mIsTesting;
+  }
+protected:
+  virtual ~FileSystemBase();
+
+  // The string representation of the file system.
+  nsString mString;
+
+  bool mShutdown;
+
+  // The permission name required to access the file system.
+  nsCString mPermission;
+
+  bool mIsTesting;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_FileSystemBase_h