diff -r 000000000000 -r 6474c204b198 security/sandbox/win/src/sandboxtarget/sandboxTarget.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/win/src/sandboxtarget/sandboxTarget.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 __SECURITY_SANDBOX_SANDBOXTARGET_H__
+#define __SECURITY_SANDBOX_SANDBOXTARGET_H__
+
+#ifdef TARGET_SANDBOX_EXPORTS
+#define TARGET_SANDBOX_EXPORT __declspec(dllexport)
+#else
+#define TARGET_SANDBOX_EXPORT __declspec(dllimport)
+#endif
+namespace mozilla {
+
+
+class TARGET_SANDBOX_EXPORT SandboxTarget
+{
+public:
+  typedef void (*StartSandboxPtr)();
+
+  /**
+   * Obtains a pointer to the singleton instance
+   */
+  static SandboxTarget* Instance()
+  {
+    static SandboxTarget sb;
+    return &sb;
+  }
+
+  /**
+   * Called by the application that will lower the sandbox token
+   *
+   * @param aStartSandboxCallback A callback function which will lower privs
+   */
+  void SetStartSandboxCallback(StartSandboxPtr aStartSandboxCallback)
+  {
+    mStartSandboxCallback = aStartSandboxCallback;
+  }
+
+  /**
+   * Called by the library that wants to start the sandbox, which in turn
+   * calls into the previously set StartSandboxCallback.
+   */
+  void StartSandbox()
+  {
+    if (mStartSandboxCallback) {
+      mStartSandboxCallback();
+    }
+  }
+
+protected:
+  SandboxTarget() :
+    mStartSandboxCallback(nullptr)
+  {
+  }
+
+  StartSandboxPtr mStartSandboxCallback;
+};
+
+
+} // mozilla
+
+#endif