diff -r 000000000000 -r 6474c204b198 netwerk/base/src/ArrayBufferInputStream.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/base/src/ArrayBufferInputStream.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 ArrayBufferInputStream_h
+#define ArrayBufferInputStream_h
+
+#include "nsIArrayBufferInputStream.h"
+#include "js/Value.h"
+#include "mozilla/Maybe.h"
+
+#define NS_ARRAYBUFFERINPUTSTREAM_CONTRACTID "@mozilla.org/io/arraybuffer-input-stream;1"
+#define NS_ARRAYBUFFERINPUTSTREAM_CID                \
+{ /* 3014dde6-aa1c-41db-87d0-48764a3710f6 */         \
+    0x3014dde6,                                      \
+    0xaa1c,                                          \
+    0x41db,                                          \
+    {0x87, 0xd0, 0x48, 0x76, 0x4a, 0x37, 0x10, 0xf6} \
+}
+
+class ArrayBufferInputStream : public nsIArrayBufferInputStream {
+public:
+  ArrayBufferInputStream();
+  virtual ~ArrayBufferInputStream() {}
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIARRAYBUFFERINPUTSTREAM
+  NS_DECL_NSIINPUTSTREAM
+
+private:
+  mozilla::Maybe<JS::PersistentRooted<JS::Value> > mArrayBuffer;
+  uint8_t* mBuffer; // start of actual buffer
+  uint32_t mBufferLength; // length of slice
+  uint32_t mOffset; // permanent offset from start of actual buffer
+  uint32_t mPos; // offset from start of slice
+  bool mClosed;
+};
+
+#endif // ArrayBufferInputStream_h