diff -r 000000000000 -r 6474c204b198 content/media/webm/WebMDecoder.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webm/WebMDecoder.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+#if !defined(WebMDecoder_h_)
+#define WebMDecoder_h_
+
+#include "MediaDecoder.h"
+
+namespace mozilla {
+
+class WebMDecoder : public MediaDecoder
+{
+public:
+  virtual MediaDecoder* Clone() {
+    if (!IsWebMEnabled()) {
+      return nullptr;
+    }
+    return new WebMDecoder();
+  }
+  virtual MediaDecoderStateMachine* CreateStateMachine();
+};
+
+} // namespace mozilla
+
+#endif