diff -r 000000000000 -r 6474c204b198 ipc/ipdl/test/cxx/TestSyncHang.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/ipdl/test/cxx/TestSyncHang.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+#ifndef mozilla__ipdltest_TestSyncHang_h
+#define mozilla__ipdltest_TestSyncHang_h 1
+
+#include "mozilla/_ipdltest/IPDLUnitTests.h"
+
+#include "mozilla/_ipdltest/PTestSyncHangParent.h"
+#include "mozilla/_ipdltest/PTestSyncHangChild.h"
+
+namespace mozilla {
+namespace _ipdltest {
+
+
+class TestSyncHangParent :
+    public PTestSyncHangParent
+{
+public:
+    TestSyncHangParent();
+    virtual ~TestSyncHangParent();
+
+    static bool RunTestInProcesses() { return true; }
+    // FIXME/bug 703323 Could work if modified
+    static bool RunTestInThreads() { return false; }
+
+    void Main();
+
+protected:    
+    virtual void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE
+    {
+        if (NormalShutdown != why)
+            fail("unexpected destruction!");  
+        passed("ok");
+        QuitParent();
+    }
+};
+
+
+class TestSyncHangChild :
+    public PTestSyncHangChild
+{
+public:
+    TestSyncHangChild();
+    virtual ~TestSyncHangChild();
+
+protected:
+    virtual void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE
+    {
+        if (NormalShutdown != why)
+            fail("unexpected destruction!");
+        QuitChild();
+    }
+};
+
+
+} // namespace _ipdltest
+} // namespace mozilla
+
+
+#endif // ifndef mozilla__ipdltest_TestSyncHang_h