diff -r 000000000000 -r 6474c204b198 dom/plugins/ipc/COMMessageFilter.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/plugins/ipc/COMMessageFilter.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+/* 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_plugins_COMMessageFilter_h
+#define mozilla_plugins_COMMessageFilter_h
+
+#include <objidl.h>
+#include "nsISupportsImpl.h"
+#include "nsAutoPtr.h"
+
+namespace mozilla {
+namespace plugins {
+
+class PluginModuleChild;
+
+class COMMessageFilter MOZ_FINAL : public IMessageFilter
+{
+public:
+  static void Initialize(PluginModuleChild* plugin);
+
+  COMMessageFilter(PluginModuleChild* plugin)
+    : mPlugin(plugin)
+  { }
+
+  HRESULT WINAPI QueryInterface(REFIID riid, void** ppv);
+  DWORD WINAPI AddRef();
+  DWORD WINAPI Release();
+
+  DWORD WINAPI HandleInComingCall(DWORD dwCallType,
+                                  HTASK htaskCaller,
+                                  DWORD dwTickCount,
+                                  LPINTERFACEINFO lpInterfaceInfo);
+  DWORD WINAPI RetryRejectedCall(HTASK htaskCallee,
+                                 DWORD dwTickCount,
+                                 DWORD dwRejectType);
+  DWORD WINAPI MessagePending(HTASK htaskCallee,
+                              DWORD dwTickCount,
+                              DWORD dwPendingType);
+
+private:
+  nsAutoRefCnt mRefCnt;
+  PluginModuleChild* mPlugin;
+  nsRefPtr<IMessageFilter> mPreviousFilter;
+};
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif // COMMessageFilter_h