diff -r 000000000000 -r 6474c204b198 modules/libjar/zipwriter/src/nsZipDataStream.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/libjar/zipwriter/src/nsZipDataStream.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+/* 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 _nsZipDataStream_h_
+#define _nsZipDataStream_h_
+
+#include "nsZipWriter.h"
+#include "nsIOutputStream.h"
+#include "nsIStreamListener.h"
+#include "nsAutoPtr.h"
+#include "mozilla/Attributes.h"
+
+class nsZipDataStream MOZ_FINAL : public nsIStreamListener
+{
+public:
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIREQUESTOBSERVER
+    NS_DECL_NSISTREAMLISTENER
+
+    nsZipDataStream()
+    {
+    }
+
+    nsresult Init(nsZipWriter *aWriter, nsIOutputStream *aStream,
+                  nsZipHeader *aHeader, int32_t aCompression);
+
+    nsresult ReadStream(nsIInputStream *aStream);
+
+private:
+
+    nsCOMPtr<nsIStreamListener> mOutput;
+    nsCOMPtr<nsIOutputStream> mStream;
+    nsRefPtr<nsZipWriter> mWriter;
+    nsRefPtr<nsZipHeader> mHeader;
+
+    nsresult CompleteEntry();
+    nsresult ProcessData(nsIRequest *aRequest, nsISupports *aContext,
+                         char *aBuffer, uint64_t aOffset, uint32_t aCount);
+};
+
+#endif