diff -r 000000000000 -r 6474c204b198 dom/plugins/ipc/PluginStreamChild.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/plugins/ipc/PluginStreamChild.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
+/* 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_PluginStreamChild_h
+#define mozilla_plugins_PluginStreamChild_h
+
+#include "mozilla/plugins/PPluginStreamChild.h"
+#include "mozilla/plugins/AStream.h"
+
+namespace mozilla {
+namespace plugins {
+
+class PluginInstanceChild;
+
+class PluginStreamChild : public PPluginStreamChild, public AStream
+{
+  friend class PluginInstanceChild;
+
+public:
+  PluginStreamChild();
+  virtual ~PluginStreamChild() { }
+
+  virtual bool IsBrowserStream() MOZ_OVERRIDE { return false; }
+
+  virtual bool Answer__delete__(const NPReason& reason,
+                                const bool& artificial) MOZ_OVERRIDE;
+
+  int32_t NPN_Write(int32_t length, void* buffer);
+  void NPP_DestroyStream(NPError reason);
+
+  void EnsureCorrectInstance(PluginInstanceChild* i)
+  {
+    if (i != Instance())
+      NS_RUNTIMEABORT("Incorrect stream instance");
+  }
+  void EnsureCorrectStream(NPStream* s)
+  {
+    if (s != &mStream)
+      NS_RUNTIMEABORT("Incorrect stream data");
+  }
+
+private:
+  PluginInstanceChild* Instance();
+
+  NPStream mStream;
+  bool mClosed;
+};
+
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif