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diff --git a/third_party/libwebrtc/test/pc/e2e/analyzer/video/video_quality_analyzer_injection_helper.h b/third_party/libwebrtc/test/pc/e2e/analyzer/video/video_quality_analyzer_injection_helper.h
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+++ b/third_party/libwebrtc/test/pc/e2e/analyzer/video/video_quality_analyzer_injection_helper.h
@@ -0,0 +1,119 @@
+/*
+ *  Copyright (c) 2019 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 TEST_PC_E2E_ANALYZER_VIDEO_VIDEO_QUALITY_ANALYZER_INJECTION_HELPER_H_
+#define TEST_PC_E2E_ANALYZER_VIDEO_VIDEO_QUALITY_ANALYZER_INJECTION_HELPER_H_
+
+#include <stdio.h>
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "api/array_view.h"
+#include "api/test/pclf/media_configuration.h"
+#include "api/test/stats_observer_interface.h"
+#include "api/test/video_quality_analyzer_interface.h"
+#include "api/video/video_frame.h"
+#include "api/video/video_sink_interface.h"
+#include "api/video_codecs/video_decoder_factory.h"
+#include "api/video_codecs/video_encoder_factory.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "system_wrappers/include/clock.h"
+#include "test/pc/e2e/analyzer/video/analyzing_video_sink.h"
+#include "test/pc/e2e/analyzer/video/analyzing_video_sinks_helper.h"
+#include "test/pc/e2e/analyzer/video/encoded_image_data_injector.h"
+#include "test/pc/e2e/analyzer/video/quality_analyzing_video_encoder.h"
+#include "test/test_video_capturer.h"
+#include "test/testsupport/video_frame_writer.h"
+
+namespace webrtc {
+namespace webrtc_pc_e2e {
+
+// Provides factory methods for components, that will be used to inject
+// VideoQualityAnalyzerInterface into PeerConnection pipeline.
+class VideoQualityAnalyzerInjectionHelper : public StatsObserverInterface {
+ public:
+  VideoQualityAnalyzerInjectionHelper(
+      Clock* clock,
+      std::unique_ptr<VideoQualityAnalyzerInterface> analyzer,
+      EncodedImageDataInjector* injector,
+      EncodedImageDataExtractor* extractor);
+  ~VideoQualityAnalyzerInjectionHelper() override;
+
+  // Wraps video encoder factory to give video quality analyzer access to frames
+  // before encoding and encoded images after.
+  std::unique_ptr<VideoEncoderFactory> WrapVideoEncoderFactory(
+      absl::string_view peer_name,
+      std::unique_ptr<VideoEncoderFactory> delegate,
+      double bitrate_multiplier,
+      QualityAnalyzingVideoEncoder::EmulatedSFUConfigMap stream_to_sfu_config)
+      const;
+  // Wraps video decoder factory to give video quality analyzer access to
+  // received encoded images and frames, that were decoded from them.
+  std::unique_ptr<VideoDecoderFactory> WrapVideoDecoderFactory(
+      absl::string_view peer_name,
+      std::unique_ptr<VideoDecoderFactory> delegate) const;
+
+  // Creates VideoFrame preprocessor, that will allow video quality analyzer to
+  // get access to the captured frames. If provided config also specifies
+  // `input_dump_file_name`, video will be written into that file.
+  std::unique_ptr<test::TestVideoCapturer::FramePreprocessor>
+  CreateFramePreprocessor(absl::string_view peer_name,
+                          const webrtc::webrtc_pc_e2e::VideoConfig& config);
+  // Creates sink, that will allow video quality analyzer to get access to
+  // the rendered frames. If corresponding video track has
+  // `output_dump_file_name` in its VideoConfig, which was used for
+  // CreateFramePreprocessor(...), then video also will be written
+  // into that file.
+  std::unique_ptr<AnalyzingVideoSink> CreateVideoSink(
+      absl::string_view peer_name,
+      const VideoSubscription& subscription,
+      bool report_infra_metrics);
+
+  void Start(std::string test_case_name,
+             rtc::ArrayView<const std::string> peer_names,
+             int max_threads_count = 1);
+
+  // Registers new call participant to the underlying video quality analyzer.
+  // The method should be called before the participant is actually added.
+  void RegisterParticipantInCall(absl::string_view peer_name);
+
+  // Will be called after test removed existing participant in the middle of the
+  // call.
+  void UnregisterParticipantInCall(absl::string_view peer_name);
+
+  // Forwards `stats_reports` for Peer Connection `pc_label` to
+  // `analyzer_`.
+  void OnStatsReports(
+      absl::string_view pc_label,
+      const rtc::scoped_refptr<const RTCStatsReport>& report) override;
+
+  // Stops VideoQualityAnalyzerInterface to populate final data and metrics.
+  // Should be invoked after analyzed video tracks are disposed.
+  void Stop();
+
+ private:
+  Clock* const clock_;
+  std::unique_ptr<VideoQualityAnalyzerInterface> analyzer_;
+  EncodedImageDataInjector* injector_;
+  EncodedImageDataExtractor* extractor_;
+
+  std::vector<std::unique_ptr<test::VideoFrameWriter>> video_writers_;
+
+  AnalyzingVideoSinksHelper sinks_helper_;
+};
+
+}  // namespace webrtc_pc_e2e
+}  // namespace webrtc
+
+#endif  // TEST_PC_E2E_ANALYZER_VIDEO_VIDEO_QUALITY_ANALYZER_INJECTION_HELPER_H_