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diff --git a/third_party/libwebrtc/pc/peer_connection_factory.h b/third_party/libwebrtc/pc/peer_connection_factory.h
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+++ b/third_party/libwebrtc/pc/peer_connection_factory.h
@@ -0,0 +1,162 @@
+
+/*
+ *  Copyright 2011 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 PC_PEER_CONNECTION_FACTORY_H_
+#define PC_PEER_CONNECTION_FACTORY_H_
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include <memory>
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "api/audio_options.h"
+#include "api/fec_controller.h"
+#include "api/field_trials_view.h"
+#include "api/media_stream_interface.h"
+#include "api/media_types.h"
+#include "api/metronome/metronome.h"
+#include "api/neteq/neteq_factory.h"
+#include "api/network_state_predictor.h"
+#include "api/peer_connection_interface.h"
+#include "api/rtc_error.h"
+#include "api/rtc_event_log/rtc_event_log.h"
+#include "api/rtc_event_log/rtc_event_log_factory_interface.h"
+#include "api/rtp_parameters.h"
+#include "api/scoped_refptr.h"
+#include "api/sequence_checker.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "api/transport/network_control.h"
+#include "api/transport/sctp_transport_factory_interface.h"
+#include "call/call.h"
+#include "call/rtp_transport_controller_send_factory_interface.h"
+#include "p2p/base/port_allocator.h"
+#include "pc/connection_context.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/rtc_certificate_generator.h"
+#include "rtc_base/thread.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace rtc {
+class BasicNetworkManager;
+class BasicPacketSocketFactory;
+}  // namespace rtc
+
+namespace webrtc {
+
+class RtcEventLog;
+
+class PeerConnectionFactory : public PeerConnectionFactoryInterface {
+ public:
+  // Creates a PeerConnectionFactory. It returns nullptr on initialization
+  // error.
+  //
+  // The Dependencies structure allows simple management of all new
+  // dependencies being added to the PeerConnectionFactory.
+  static rtc::scoped_refptr<PeerConnectionFactory> Create(
+      PeerConnectionFactoryDependencies dependencies);
+
+  void SetOptions(const Options& options) override;
+
+  RTCErrorOr<rtc::scoped_refptr<PeerConnectionInterface>>
+  CreatePeerConnectionOrError(
+      const PeerConnectionInterface::RTCConfiguration& configuration,
+      PeerConnectionDependencies dependencies) override;
+
+  RtpCapabilities GetRtpSenderCapabilities(
+      cricket::MediaType kind) const override;
+
+  RtpCapabilities GetRtpReceiverCapabilities(
+      cricket::MediaType kind) const override;
+
+  rtc::scoped_refptr<MediaStreamInterface> CreateLocalMediaStream(
+      const std::string& stream_id) override;
+
+  rtc::scoped_refptr<AudioSourceInterface> CreateAudioSource(
+      const cricket::AudioOptions& options) override;
+
+  rtc::scoped_refptr<VideoTrackInterface> CreateVideoTrack(
+      const std::string& id,
+      VideoTrackSourceInterface* video_source) override;
+
+  rtc::scoped_refptr<AudioTrackInterface> CreateAudioTrack(
+      const std::string& id,
+      AudioSourceInterface* audio_source) override;
+
+  bool StartAecDump(FILE* file, int64_t max_size_bytes) override;
+  void StopAecDump() override;
+
+  SctpTransportFactoryInterface* sctp_transport_factory() {
+    return context_->sctp_transport_factory();
+  }
+
+  rtc::Thread* signaling_thread() const {
+    // This method can be called on a different thread when the factory is
+    // created in CreatePeerConnectionFactory().
+    return context_->signaling_thread();
+  }
+
+  rtc::Thread* worker_thread() const { return context_->worker_thread(); }
+
+  const Options& options() const {
+    RTC_DCHECK_RUN_ON(signaling_thread());
+    return options_;
+  }
+
+  const FieldTrialsView& field_trials() const {
+    return context_->field_trials();
+  }
+
+  cricket::MediaEngineInterface* media_engine() const;
+
+ protected:
+  // Constructor used by the static Create() method. Modifies the dependencies.
+  PeerConnectionFactory(rtc::scoped_refptr<ConnectionContext> context,
+                        PeerConnectionFactoryDependencies* dependencies);
+
+  // Constructor for use in testing. Ignores the possibility of initialization
+  // failure. The dependencies are passed in by std::move().
+  explicit PeerConnectionFactory(
+      PeerConnectionFactoryDependencies dependencies);
+
+  virtual ~PeerConnectionFactory();
+
+ private:
+  rtc::Thread* network_thread() const { return context_->network_thread(); }
+
+  bool IsTrialEnabled(absl::string_view key) const;
+
+  std::unique_ptr<RtcEventLog> CreateRtcEventLog_w();
+  std::unique_ptr<Call> CreateCall_w(
+      RtcEventLog* event_log,
+      const FieldTrialsView& field_trials,
+      const PeerConnectionInterface::RTCConfiguration& configuration);
+
+  rtc::scoped_refptr<ConnectionContext> context_;
+  PeerConnectionFactoryInterface::Options options_
+      RTC_GUARDED_BY(signaling_thread());
+  std::unique_ptr<TaskQueueFactory> task_queue_factory_;
+  std::unique_ptr<RtcEventLogFactoryInterface> event_log_factory_;
+  std::unique_ptr<FecControllerFactoryInterface> fec_controller_factory_;
+  std::unique_ptr<NetworkStatePredictorFactoryInterface>
+      network_state_predictor_factory_;
+  std::unique_ptr<NetworkControllerFactoryInterface>
+      injected_network_controller_factory_;
+  std::unique_ptr<NetEqFactory> neteq_factory_;
+  const std::unique_ptr<RtpTransportControllerSendFactoryInterface>
+      transport_controller_send_factory_;
+  std::unique_ptr<Metronome> metronome_ RTC_GUARDED_BY(worker_thread());
+};
+
+}  // namespace webrtc
+
+#endif  // PC_PEER_CONNECTION_FACTORY_H_