diff -r 000000000000 -r 6474c204b198 dom/file/nsIFileStorage.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/file/nsIFileStorage.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,57 @@
+/* -*- 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 nsIFileStorage_h__
+#define nsIFileStorage_h__
+
+#include "nsISupports.h"
+
+#define NS_FILESTORAGE_IID \
+  {0x6278f453, 0xd557, 0x4a55, \
+  { 0x99, 0x3e, 0xf4, 0x69, 0xe2, 0xa5, 0xe1, 0xd0 } }
+
+class nsIFileStorage : public nsISupports
+{
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_FILESTORAGE_IID)
+
+  NS_IMETHOD_(const nsACString&)
+  Id() = 0;
+
+  // Whether or not the storage has been invalidated. If it has then no further
+  // operations for this storage will be allowed to run.
+  NS_IMETHOD_(bool)
+  IsInvalidated() = 0;
+
+  NS_IMETHOD_(bool)
+  IsShuttingDown() = 0;
+
+  NS_IMETHOD_(void)
+  SetThreadLocals() = 0;
+
+  NS_IMETHOD_(void)
+  UnsetThreadLocals() = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIFileStorage, NS_FILESTORAGE_IID)
+
+#define NS_DECL_NSIFILESTORAGE                                                 \
+  NS_IMETHOD_(const nsACString&)                                               \
+  Id() MOZ_OVERRIDE;                                                           \
+                                                                               \
+  NS_IMETHOD_(bool)                                                            \
+  IsInvalidated() MOZ_OVERRIDE;                                                \
+                                                                               \
+  NS_IMETHOD_(bool)                                                            \
+  IsShuttingDown() MOZ_OVERRIDE;                                               \
+                                                                               \
+  NS_IMETHOD_(void)                                                            \
+  SetThreadLocals() MOZ_OVERRIDE;                                              \
+                                                                               \
+  NS_IMETHOD_(void)                                                            \
+  UnsetThreadLocals() MOZ_OVERRIDE;
+
+#endif // nsIFileStorage_h__