diff -r 000000000000 -r 6474c204b198 tools/profiler/JSStreamWriter.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/profiler/JSStreamWriter.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+/* -*- 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 JSSTREAMWRITER_H
+#define JSSTREAMWRITER_H
+
+#include <ostream>
+#include <stdlib.h>
+#include "nsDeque.h"
+
+class JSStreamWriter
+{
+public:
+  JSStreamWriter(std::ostream& aStream);
+  ~JSStreamWriter();
+
+  void BeginObject();
+  void EndObject();
+  void BeginArray();
+  void EndArray();
+  void Name(const char *name);
+  void Value(int value);
+  void Value(double value);
+  void Value(const char *value, size_t valueLength);
+  void Value(const char *value);
+  template <typename T>
+  void NameValue(const char *aName, T aValue)
+  {
+    Name(aName);
+    Value(aValue);
+  }
+
+private:
+  std::ostream& mStream;
+  bool mNeedsComma;
+  bool mNeedsName;
+
+  nsDeque mStack;
+
+  // This class can't be copied
+  JSStreamWriter(const JSStreamWriter&);
+  JSStreamWriter& operator=(const JSStreamWriter&);
+
+  void* operator new(size_t);
+  void* operator new[](size_t);
+  void operator delete(void*) {
+    // Since JSStreamWriter has a virtual destructor the compiler
+    // has to provide a destructor in the object file that will call
+    // operate delete in case there is a derived class since its
+    // destructor won't know how to free this instance.
+    abort();
+  }
+  void operator delete[](void*);
+};
+
+#endif