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diff --git a/third_party/libwebrtc/test/encoder_settings.cc b/third_party/libwebrtc/test/encoder_settings.cc
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+++ b/third_party/libwebrtc/test/encoder_settings.cc
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+/*
+ *  Copyright (c) 2014 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.
+ */
+#include "test/encoder_settings.h"
+
+#include <algorithm>
+
+#include "api/scoped_refptr.h"
+#include "api/video_codecs/sdp_video_format.h"
+#include "call/rtp_config.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+namespace test {
+
+const size_t DefaultVideoStreamFactory::kMaxNumberOfStreams;
+const int DefaultVideoStreamFactory::kMaxBitratePerStream[] = {150000, 450000,
+                                                               1500000};
+const int DefaultVideoStreamFactory::kDefaultMinBitratePerStream[] = {
+    30000, 200000, 700000};
+
+// static
+std::vector<VideoStream> CreateVideoStreams(
+    int width,
+    int height,
+    const webrtc::VideoEncoderConfig& encoder_config) {
+  RTC_DCHECK(encoder_config.number_of_streams <=
+             DefaultVideoStreamFactory::kMaxNumberOfStreams);
+
+  std::vector<VideoStream> stream_settings(encoder_config.number_of_streams);
+
+  int bitrate_left_bps = 0;
+  if (encoder_config.max_bitrate_bps > 0) {
+    bitrate_left_bps = encoder_config.max_bitrate_bps;
+  } else {
+    for (size_t stream_num = 0; stream_num < encoder_config.number_of_streams;
+         ++stream_num) {
+      bitrate_left_bps +=
+          DefaultVideoStreamFactory::kMaxBitratePerStream[stream_num];
+    }
+  }
+
+  for (size_t i = 0; i < encoder_config.number_of_streams; ++i) {
+    stream_settings[i].width =
+        (i + 1) * width / encoder_config.number_of_streams;
+    stream_settings[i].height =
+        (i + 1) * height / encoder_config.number_of_streams;
+    stream_settings[i].max_framerate = 30;
+    stream_settings[i].max_qp = 56;
+    stream_settings[i].min_bitrate_bps =
+        DefaultVideoStreamFactory::kDefaultMinBitratePerStream[i];
+
+    // Use configured values instead of default values if set.
+    const VideoStream stream = (i < encoder_config.simulcast_layers.size())
+                                   ? encoder_config.simulcast_layers[i]
+                                   : VideoStream();
+
+    int max_bitrate_bps =
+        stream.max_bitrate_bps > 0
+            ? stream.max_bitrate_bps
+            : DefaultVideoStreamFactory::kMaxBitratePerStream[i];
+    max_bitrate_bps = std::min(bitrate_left_bps, max_bitrate_bps);
+
+    int target_bitrate_bps = stream.target_bitrate_bps > 0
+                                 ? stream.target_bitrate_bps
+                                 : max_bitrate_bps;
+    target_bitrate_bps = std::min(max_bitrate_bps, target_bitrate_bps);
+
+    if (stream.min_bitrate_bps > 0) {
+      RTC_DCHECK_LE(stream.min_bitrate_bps, target_bitrate_bps);
+      stream_settings[i].min_bitrate_bps = stream.min_bitrate_bps;
+    }
+    if (stream.max_framerate > 0) {
+      stream_settings[i].max_framerate = stream.max_framerate;
+    }
+    if (stream.num_temporal_layers) {
+      RTC_DCHECK_GE(*stream.num_temporal_layers, 1);
+      stream_settings[i].num_temporal_layers = stream.num_temporal_layers;
+    }
+    if (stream.scale_resolution_down_by >= 1.0) {
+      stream_settings[i].width = width / stream.scale_resolution_down_by;
+      stream_settings[i].height = height / stream.scale_resolution_down_by;
+    }
+    stream_settings[i].scalability_mode = stream.scalability_mode;
+    stream_settings[i].target_bitrate_bps = target_bitrate_bps;
+    stream_settings[i].max_bitrate_bps = max_bitrate_bps;
+    stream_settings[i].active =
+        encoder_config.number_of_streams == 1 || stream.active;
+
+    bitrate_left_bps -= stream_settings[i].target_bitrate_bps;
+  }
+
+  stream_settings[encoder_config.number_of_streams - 1].max_bitrate_bps +=
+      bitrate_left_bps;
+  stream_settings[0].bitrate_priority = encoder_config.bitrate_priority;
+
+  return stream_settings;
+}
+
+DefaultVideoStreamFactory::DefaultVideoStreamFactory() {}
+
+std::vector<VideoStream> DefaultVideoStreamFactory::CreateEncoderStreams(
+    int frame_width,
+    int frame_height,
+    const webrtc::VideoEncoderConfig& encoder_config) {
+  return CreateVideoStreams(frame_width, frame_height, encoder_config);
+}
+
+void FillEncoderConfiguration(VideoCodecType codec_type,
+                              size_t num_streams,
+                              VideoEncoderConfig* configuration) {
+  RTC_DCHECK_LE(num_streams, DefaultVideoStreamFactory::kMaxNumberOfStreams);
+
+  configuration->codec_type = codec_type;
+  configuration->number_of_streams = num_streams;
+  configuration->video_stream_factory =
+      rtc::make_ref_counted<DefaultVideoStreamFactory>();
+  configuration->max_bitrate_bps = 0;
+  configuration->frame_drop_enabled = true;
+  configuration->simulcast_layers = std::vector<VideoStream>(num_streams);
+  for (size_t i = 0; i < num_streams; ++i) {
+    configuration->max_bitrate_bps +=
+        DefaultVideoStreamFactory::kMaxBitratePerStream[i];
+  }
+}
+
+VideoReceiveStreamInterface::Decoder CreateMatchingDecoder(
+    int payload_type,
+    const std::string& payload_name) {
+  VideoReceiveStreamInterface::Decoder decoder;
+  decoder.payload_type = payload_type;
+  decoder.video_format = SdpVideoFormat(payload_name);
+  return decoder;
+}
+
+VideoReceiveStreamInterface::Decoder CreateMatchingDecoder(
+    const VideoSendStream::Config& config) {
+  return CreateMatchingDecoder(config.rtp.payload_type,
+                               config.rtp.payload_name);
+}
+
+}  // namespace test
+}  // namespace webrtc