Revert 148024 - [cros] Implement WebM encoder/muxer for animated avatar capture.

media/webm/chromeos/ebml_writer.cc

-// Copyright (c) 2012 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.
-
-#include "media/webm/chromeos/ebml_writer.h"
-
-#include "media/base/media_export.h"
-
-extern "C" {
-#include "third_party/libvpx/source/libvpx/libmkv/EbmlWriter.h"
-
-// These functions must be in the global namespace and visible to libmkv.
-
-void MEDIA_EXPORT Ebml_Write(EbmlGlobal* glob,
-                             const void* buffer,
-                             unsigned long len) {
-  glob->write_cb.Run(buffer, len);
-}
-
-void MEDIA_EXPORT Ebml_Serialize(EbmlGlobal* glob,
-                                 const void* buffer,
-                                 int buffer_size,
-                                 unsigned long len) {
-  glob->serialize_cb.Run(buffer, buffer_size, len);
-}
-
-}  // extern "C"