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diff --git a/third_party/libwebrtc/api/video_codecs/vp8_temporal_layers.h b/third_party/libwebrtc/api/video_codecs/vp8_temporal_layers.h
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+/*
+ *  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 API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_
+#define API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_
+
+#include <memory>
+#include <vector>
+
+#include "api/fec_controller_override.h"
+#include "api/video_codecs/video_codec.h"
+#include "api/video_codecs/vp8_frame_buffer_controller.h"
+#include "api/video_codecs/vp8_frame_config.h"
+
+namespace webrtc {
+
+// Two different flavors of temporal layers are currently available:
+// kFixedPattern uses a fixed repeating pattern of 1-4 layers.
+// kBitrateDynamic can allocate frames dynamically to 1 or 2 layers, based on
+// the bitrate produced.
+// TODO(eladalon): Remove this enum.
+enum class Vp8TemporalLayersType { kFixedPattern, kBitrateDynamic };
+
+// This interface defines a way of getting the encoder settings needed to
+// realize a temporal layer structure.
+class Vp8TemporalLayers final : public Vp8FrameBufferController {
+ public:
+  Vp8TemporalLayers(
+      std::vector<std::unique_ptr<Vp8FrameBufferController>>&& controllers,
+      FecControllerOverride* fec_controller_override);
+  ~Vp8TemporalLayers() override = default;
+
+  void SetQpLimits(size_t stream_index, int min_qp, int max_qp) override;
+
+  size_t StreamCount() const override;
+
+  bool SupportsEncoderFrameDropping(size_t stream_index) const override;
+
+  void OnRatesUpdated(size_t stream_index,
+                      const std::vector<uint32_t>& bitrates_bps,
+                      int framerate_fps) override;
+
+  Vp8EncoderConfig UpdateConfiguration(size_t stream_index) override;
+
+  Vp8FrameConfig NextFrameConfig(size_t stream_index,
+                                 uint32_t rtp_timestamp) override;
+
+  void OnEncodeDone(size_t stream_index,
+                    uint32_t rtp_timestamp,
+                    size_t size_bytes,
+                    bool is_keyframe,
+                    int qp,
+                    CodecSpecificInfo* info) override;
+
+  void OnFrameDropped(size_t stream_index, uint32_t rtp_timestamp) override;
+
+  void OnPacketLossRateUpdate(float packet_loss_rate) override;
+
+  void OnRttUpdate(int64_t rtt_ms) override;
+
+  void OnLossNotification(
+      const VideoEncoder::LossNotification& loss_notification) override;
+
+ private:
+  std::vector<std::unique_ptr<Vp8FrameBufferController>> controllers_;
+};
+
+}  // namespace webrtc
+
+#endif  // API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_