Revert of Clean up. Experimental user avatars removed.

media/formats/webm/chromeos/ebml_writer.h

Index: media/formats/webm/chromeos/ebml_writer.h
diff --git a/media/formats/webm/chromeos/ebml_writer.h b/media/formats/webm/chromeos/ebml_writer.h
new file mode 100644
index 0000000000000000000000000000000000000000..3c1faa042970e44c63d30dbd4328649b7c48822a
--- /dev/null
+++ b/media/formats/webm/chromeos/ebml_writer.h
@@ -0,0 +1,21 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_FORMATS_WEBM_CHROMEOS_EBML_WRITER_H_
+#define MEDIA_FORMATS_WEBM_CHROMEOS_EBML_WRITER_H_
+
+#include "base/callback.h"
+
+// This struct serves as a bridge betweeen static libmkv interface and Chrome's
+// base::Callback. Must be in the global namespace. See EbmlWriter.h.
+struct EbmlGlobal {
+  EbmlGlobal();
+  ~EbmlGlobal();
+
+  base::Callback<void(const void* buffer, unsigned long len)> write_cb;
+  base::Callback<void(const void* buffer, int buffer_size, unsigned long len)>
+      serialize_cb;
+};
+
+#endif  // MEDIA_FORMATS_WEBM_CHROMEOS_EBML_WRITER_H_