diff -r 000000000000 -r 6474c204b198 xpcom/io/nsScriptableBase64Encoder.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/io/nsScriptableBase64Encoder.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- 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/. */
+
+#include "nsScriptableBase64Encoder.h"
+#include "mozilla/Base64.h"
+
+using namespace mozilla;
+
+NS_IMPL_ISUPPORTS(nsScriptableBase64Encoder, nsIScriptableBase64Encoder)
+
+/* ACString encodeToCString (in nsIInputStream stream, in unsigned long length); */
+NS_IMETHODIMP
+nsScriptableBase64Encoder::EncodeToCString(nsIInputStream *aStream,
+                                           uint32_t aLength,
+                                           nsACString & _retval)
+{
+  Base64EncodeInputStream(aStream, _retval, aLength);
+  return NS_OK;
+}
+
+/* AString encodeToString (in nsIInputStream stream, in unsigned long length); */
+NS_IMETHODIMP
+nsScriptableBase64Encoder::EncodeToString(nsIInputStream *aStream,
+                                          uint32_t aLength,
+                                          nsAString & _retval)
+{
+  Base64EncodeInputStream(aStream, _retval, aLength);
+  return NS_OK;
+}