diff -r 000000000000 -r 6474c204b198 intl/uconv/src/nsReplacementToUnicode.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/src/nsReplacementToUnicode.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* 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 nsReplacementToUnicode_h_
+#define nsReplacementToUnicode_h_
+
+#include "nsUCSupport.h"
+
+#define NS_REPLACEMENTTOUNICODE_CID \
+  { 0xd24b24da, 0xc607, 0x489a, \
+    { 0xb5, 0xf0, 0x67, 0x91, 0xf4, 0x45, 0x45, 0x6d } }
+
+#define NS_REPLACEMENTTOUNICODE_CONTRACTID \
+  "@mozilla.org/intl/unicode/decoder;1?charset=replacement"
+
+class nsReplacementToUnicode : public nsBasicDecoderSupport
+{
+public:
+  nsReplacementToUnicode();
+
+  NS_IMETHOD Convert(const char* aSrc,
+                     int32_t* aSrcLength,
+                     char16_t* aDest,
+                     int32_t* aDestLength);
+
+  NS_IMETHOD GetMaxLength(const char* aSrc,
+                          int32_t aSrcLength,
+                          int32_t* aDestLength);
+
+  NS_IMETHOD Reset();
+
+private:
+  bool mSeenByte;
+};
+
+#endif // nsReplacementToUnicode_h_