diff -r 000000000000 -r 6474c204b198 ipc/glue/ProcessChild.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/glue/ProcessChild.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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 "nsDebug.h"
+
+#include "mozilla/ipc/IOThreadChild.h"
+#include "mozilla/ipc/ProcessChild.h"
+
+namespace mozilla {
+namespace ipc {
+
+ProcessChild* ProcessChild::gProcessChild;
+
+ProcessChild::ProcessChild(ProcessHandle parentHandle)
+  : ChildProcess(new IOThreadChild())
+  , mUILoop(MessageLoop::current())
+  , mParentHandle(parentHandle)
+{
+  NS_ABORT_IF_FALSE(mUILoop, "UILoop should be created by now");
+  NS_ABORT_IF_FALSE(!gProcessChild, "should only be one ProcessChild");
+  gProcessChild = this;
+}
+
+ProcessChild::~ProcessChild()
+{
+  gProcessChild = nullptr;
+}
+
+} // namespace ipc
+} // namespace mozilla