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diff --git a/third_party/libwebrtc/modules/video_coding/codecs/multiplex/include/augmented_video_frame_buffer.h b/third_party/libwebrtc/modules/video_coding/codecs/multiplex/include/augmented_video_frame_buffer.h
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+++ b/third_party/libwebrtc/modules/video_coding/codecs/multiplex/include/augmented_video_frame_buffer.h
@@ -0,0 +1,62 @@
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_AUGMENTED_VIDEO_FRAME_BUFFER_H_
+#define MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_AUGMENTED_VIDEO_FRAME_BUFFER_H_
+
+#include <cstdint>
+#include <memory>
+
+#include "api/scoped_refptr.h"
+#include "api/video/video_frame_buffer.h"
+
+namespace webrtc {
+class AugmentedVideoFrameBuffer : public VideoFrameBuffer {
+ public:
+  AugmentedVideoFrameBuffer(
+      const rtc::scoped_refptr<VideoFrameBuffer>& video_frame_buffer,
+      std::unique_ptr<uint8_t[]> augmenting_data,
+      uint16_t augmenting_data_size);
+
+  // Retrieves the underlying VideoFrameBuffer without the augmented data
+  rtc::scoped_refptr<VideoFrameBuffer> GetVideoFrameBuffer() const;
+
+  // Gets a pointer to the augmenting data and moves ownership to the caller
+  uint8_t* GetAugmentingData() const;
+
+  // Get the size of the augmenting data
+  uint16_t GetAugmentingDataSize() const;
+
+  // Returns the type of the underlying VideoFrameBuffer
+  Type type() const final;
+
+  // Returns the width of the underlying VideoFrameBuffer
+  int width() const final;
+
+  // Returns the height of the underlying VideoFrameBuffer
+  int height() const final;
+
+  // Get the I140 Buffer from the underlying frame buffer
+  rtc::scoped_refptr<I420BufferInterface> ToI420() final;
+  // Returns GetI420() of the underlying VideoFrameBuffer.
+  // TODO(hbos): AugmentedVideoFrameBuffer should not return a type (such as
+  // kI420) without also implementing that type's interface (i.e.
+  // I420BufferInterface). Either implement all possible Type's interfaces or
+  // return kNative.
+  const I420BufferInterface* GetI420() const final;
+
+ private:
+  uint16_t augmenting_data_size_;
+  std::unique_ptr<uint8_t[]> augmenting_data_;
+  rtc::scoped_refptr<webrtc::VideoFrameBuffer> video_frame_buffer_;
+};
+}  // namespace webrtc
+
+#endif  // MODULES_VIDEO_CODING_CODECS_MULTIPLEX_INCLUDE_AUGMENTED_VIDEO_FRAME_BUFFER_H_