diff -r 000000000000 -r 6474c204b198 dom/ipc/PCOMContentPermissionRequestChild.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/ipc/PCOMContentPermissionRequestChild.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* 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 PCOMContentPermissionRequestChild_h
+#define PCOMContentPermissionRequestChild_h
+
+#include "mozilla/dom/PContentPermissionRequestChild.h"
+// Microsoft's API Name hackery sucks
+// XXXbz Doing this in a header is a gigantic footgun.  See
+// https://bugzilla.mozilla.org/show_bug.cgi?id=932421#c3 for why.
+#undef CreateEvent
+
+/*
+  PContentPermissionRequestChild implementations also are
+  XPCOM objects.  Addref() is called on their implementation
+  before SendPContentPermissionRequestConstructor is called.
+  When Dealloc is called, IPDLRelease() is called.
+  Implementations of this method are expected to call
+  Release() on themselves.  See Bug 594261 for more
+  information.
+ */
+class PCOMContentPermissionRequestChild : public mozilla::dom::PContentPermissionRequestChild {
+public:
+  virtual void IPDLRelease() = 0;
+#ifdef DEBUG
+  PCOMContentPermissionRequestChild() : mIPCOpen(false) {}
+  virtual ~PCOMContentPermissionRequestChild() {
+    // mIPCOpen is set to true in TabChild::SendPContentPermissionRequestConstructor
+    // and set to false in TabChild::DeallocPContentPermissionRequest
+    MOZ_ASSERT(!mIPCOpen, "Protocol must not be open when PCOMContentPermissionRequestChild is destroyed.");
+  }
+  bool mIPCOpen;
+#endif /* DEBUG */
+};
+
+#endif