diff -r 000000000000 -r 6474c204b198 ipc/ipdl/test/cxx/TestRaceDeferral.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/ipdl/test/cxx/TestRaceDeferral.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,74 @@
+#ifndef mozilla__ipdltest_TestRaceDeferral_h
+#define mozilla__ipdltest_TestRaceDeferral_h 1
+
+#include "mozilla/_ipdltest/IPDLUnitTests.h"
+
+#include "mozilla/_ipdltest/PTestRaceDeferralParent.h"
+#include "mozilla/_ipdltest/PTestRaceDeferralChild.h"
+
+namespace mozilla {
+namespace _ipdltest {
+
+class TestRaceDeferralParent :
+    public PTestRaceDeferralParent
+{
+public:
+    TestRaceDeferralParent();
+    virtual ~TestRaceDeferralParent();
+
+    static bool RunTestInProcesses() { return true; }
+    static bool RunTestInThreads() { return true; }
+
+    void Main();
+
+protected:
+    void Test1();
+
+    virtual bool AnswerLose() MOZ_OVERRIDE;
+
+    virtual mozilla::ipc::RacyInterruptPolicy
+    MediateInterruptRace(const Message& parent, const Message& child) MOZ_OVERRIDE;
+
+    virtual void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE
+    {
+        if (NormalShutdown != why)
+            fail("unexpected destruction!");  
+        passed("ok");
+        QuitParent();
+    }
+
+    bool mProcessedLose;
+};
+
+
+class TestRaceDeferralChild :
+    public PTestRaceDeferralChild
+{
+public:
+    TestRaceDeferralChild();
+    virtual ~TestRaceDeferralChild();
+
+protected:
+    virtual bool RecvStartRace() MOZ_OVERRIDE;
+
+    virtual bool AnswerWin() MOZ_OVERRIDE;
+
+    virtual bool AnswerRpc() MOZ_OVERRIDE;
+
+    virtual mozilla::ipc::RacyInterruptPolicy
+    MediateInterruptRace(const Message& parent, const Message& child) MOZ_OVERRIDE;
+
+    virtual void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE
+    {
+        if (NormalShutdown != why)
+            fail("unexpected destruction!");
+        QuitChild();
+    }
+};
+
+
+} // namespace _ipdltest
+} // namespace mozilla
+
+
+#endif // ifndef mozilla__ipdltest_TestRaceDeferral_h