diff -r 000000000000 -r 6474c204b198 ipc/glue/BackgroundChildImpl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/glue/BackgroundChildImpl.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+/* 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 mozilla_ipc_backgroundchildimpl_h__
+#define mozilla_ipc_backgroundchildimpl_h__
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ipc/PBackgroundChild.h"
+
+template <class> class nsAutoPtr;
+
+namespace mozilla {
+namespace ipc {
+
+// Instances of this class should never be created directly. This class is meant
+// to be inherited in BackgroundImpl.
+class BackgroundChildImpl : public PBackgroundChild
+{
+public:
+  class ThreadLocal;
+
+  // Get the ThreadLocal for the current thread if
+  // BackgroundChild::GetOrCreateForCurrentThread() has been called and true was
+  // returned (e.g. a valid PBackgroundChild actor has been created or is in the
+  // process of being created). Otherwise this function returns null.
+  // This functions is implemented in BackgroundImpl.cpp.
+  static ThreadLocal*
+  GetThreadLocalForCurrentThread();
+
+protected:
+  BackgroundChildImpl();
+  virtual ~BackgroundChildImpl();
+
+  virtual void
+  ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
+
+  virtual PBackgroundTestChild*
+  AllocPBackgroundTestChild(const nsCString& aTestArg) MOZ_OVERRIDE;
+
+  virtual bool
+  DeallocPBackgroundTestChild(PBackgroundTestChild* aActor) MOZ_OVERRIDE;
+};
+
+class BackgroundChildImpl::ThreadLocal
+{
+  friend class nsAutoPtr<ThreadLocal>;
+
+  // Add any members needed here.
+
+public:
+  ThreadLocal();
+
+private:
+  // Only destroyed by nsAutoPtr<ThreadLocal>.
+  ~ThreadLocal();
+};
+
+} // namespace ipc
+} // namespace mozilla
+
+#endif // mozilla_ipc_backgroundchildimpl_h__