diff -r 000000000000 -r 6474c204b198 dom/src/json/nsJSON.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/src/json/nsJSON.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,91 @@
+/* -*- Mode: C++; tab-width: 2; 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 nsJSON_h__
+#define nsJSON_h__
+
+#include "nsIJSON.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsIOutputStream.h"
+#include "nsIUnicodeEncoder.h"
+#include "nsIUnicodeDecoder.h"
+#include "nsIRequestObserver.h"
+#include "nsIStreamListener.h"
+#include "nsTArray.h"
+
+class nsIURI;
+
+class MOZ_STACK_CLASS nsJSONWriter
+{
+public:
+  nsJSONWriter();
+  nsJSONWriter(nsIOutputStream *aStream);
+  virtual ~nsJSONWriter();
+  nsresult SetCharset(const char *aCharset);
+  nsCOMPtr<nsIOutputStream> mStream;
+  nsresult Write(const char16_t *aBuffer, uint32_t aLength);
+  nsString mOutputString;
+  bool DidWrite();
+  void FlushBuffer();
+
+protected:
+  char16_t *mBuffer;
+  uint32_t mBufferCount;
+  bool mDidWrite;
+  nsresult WriteToStream(nsIOutputStream *aStream, nsIUnicodeEncoder *encoder,
+                         const char16_t *aBuffer, uint32_t aLength);
+
+  nsCOMPtr<nsIUnicodeEncoder> mEncoder;
+};
+
+class nsJSON : public nsIJSON
+{
+public:
+  nsJSON();
+  virtual ~nsJSON();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIJSON
+
+protected:
+  nsresult EncodeInternal(JSContext* cx,
+                          const JS::Value& val,
+                          nsJSONWriter* writer);
+
+  nsresult DecodeInternal(JSContext* cx,
+                          nsIInputStream* aStream,
+                          int32_t aContentLength,
+                          bool aNeedsConverter,
+                          JS::MutableHandle<JS::Value> aRetVal);
+  nsCOMPtr<nsIURI> mURI;
+};
+
+nsresult
+NS_NewJSON(nsISupports* aOuter, REFNSIID aIID, void** aResult);
+
+class nsJSONListener : public nsIStreamListener
+{
+public:
+  nsJSONListener(JSContext *cx, JS::Value *rootVal, bool needsConverter);
+  virtual ~nsJSONListener();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIREQUESTOBSERVER
+  NS_DECL_NSISTREAMLISTENER
+
+protected:
+  bool mNeedsConverter;
+  JSContext *mCx;
+  JS::Value *mRootVal;
+  nsCOMPtr<nsIUnicodeDecoder> mDecoder;
+  nsCString mSniffBuffer;
+  nsTArray<char16_t> mBufferedChars;
+  nsresult ProcessBytes(const char* aBuffer, uint32_t aByteLength);
+  nsresult ConsumeConverted(const char* aBuffer, uint32_t aByteLength);
+  nsresult Consume(const char16_t *data, uint32_t len);
+};
+
+#endif