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diff --git a/third_party/libwebrtc/api/video/encoded_frame.h b/third_party/libwebrtc/api/video/encoded_frame.h
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+++ b/third_party/libwebrtc/api/video/encoded_frame.h
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+/*
+ *  Copyright (c) 2016 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 API_VIDEO_ENCODED_FRAME_H_
+#define API_VIDEO_ENCODED_FRAME_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "absl/types/optional.h"
+#include "api/units/timestamp.h"
+#include "modules/video_coding/encoded_frame.h"
+
+namespace webrtc {
+
+// TODO(philipel): Remove webrtc::VCMEncodedFrame inheritance.
+// TODO(philipel): Move transport specific info out of EncodedFrame.
+// NOTE: This class is still under development and may change without notice.
+class EncodedFrame : public webrtc::VCMEncodedFrame {
+ public:
+  static const uint8_t kMaxFrameReferences = 5;
+
+  EncodedFrame() = default;
+  EncodedFrame(const EncodedFrame&) = default;
+  virtual ~EncodedFrame() {}
+
+  // When this frame was received.
+  // TODO(bugs.webrtc.org/13756): Use Timestamp instead of int.
+  virtual int64_t ReceivedTime() const = 0;
+  // Returns a Timestamp from `ReceivedTime`, or nullopt if there is no receive
+  // time.
+  absl::optional<webrtc::Timestamp> ReceivedTimestamp() const;
+
+  // When this frame should be rendered.
+  // TODO(bugs.webrtc.org/13756): Use Timestamp instead of int.
+  virtual int64_t RenderTime() const = 0;
+  // Returns a Timestamp from `RenderTime`, or nullopt if there is no
+  // render time.
+  absl::optional<webrtc::Timestamp> RenderTimestamp() const;
+
+  // This information is currently needed by the timing calculation class.
+  // TODO(philipel): Remove this function when a new timing class has
+  //                 been implemented.
+  virtual bool delayed_by_retransmission() const;
+
+  bool is_keyframe() const { return num_references == 0; }
+
+  void SetId(int64_t id) { id_ = id; }
+  int64_t Id() const { return id_; }
+
+  // TODO(philipel): Add simple modify/access functions to prevent adding too
+  // many `references`.
+  size_t num_references = 0;
+  int64_t references[kMaxFrameReferences];
+  // Is this subframe the last one in the superframe (In RTP stream that would
+  // mean that the last packet has a marker bit set).
+  bool is_last_spatial_layer = true;
+
+ private:
+  // The ID of the frame is determined from RTP level information. The IDs are
+  // used to describe order and dependencies between frames.
+  int64_t id_ = -1;
+};
+
+}  // namespace webrtc
+
+#endif  // API_VIDEO_ENCODED_FRAME_H_