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diff --git a/third_party/libwebrtc/api/ice_transport_interface.h b/third_party/libwebrtc/api/ice_transport_interface.h
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+++ b/third_party/libwebrtc/api/ice_transport_interface.h
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+/*
+ *  Copyright 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 API_ICE_TRANSPORT_INTERFACE_H_
+#define API_ICE_TRANSPORT_INTERFACE_H_
+
+#include <string>
+
+#include "api/async_dns_resolver.h"
+#include "api/async_resolver_factory.h"
+#include "api/rtc_error.h"
+#include "api/rtc_event_log/rtc_event_log.h"
+#include "api/scoped_refptr.h"
+#include "rtc_base/ref_count.h"
+
+namespace cricket {
+class IceTransportInternal;
+class PortAllocator;
+class IceControllerFactoryInterface;
+class ActiveIceControllerFactoryInterface;
+}  // namespace cricket
+
+namespace webrtc {
+class FieldTrialsView;
+
+// An ICE transport, as represented to the outside world.
+// This object is refcounted, and is therefore alive until the
+// last holder has released it.
+class IceTransportInterface : public rtc::RefCountInterface {
+ public:
+  // Accessor for the internal representation of an ICE transport.
+  // The returned object can only be safely used on the signalling thread.
+  // TODO(crbug.com/907849): Add API calls for the functions that have to
+  // be exposed to clients, and stop allowing access to the
+  // cricket::IceTransportInternal API.
+  virtual cricket::IceTransportInternal* internal() = 0;
+};
+
+struct IceTransportInit final {
+ public:
+  IceTransportInit() = default;
+  IceTransportInit(const IceTransportInit&) = delete;
+  IceTransportInit(IceTransportInit&&) = default;
+  IceTransportInit& operator=(const IceTransportInit&) = delete;
+  IceTransportInit& operator=(IceTransportInit&&) = default;
+
+  cricket::PortAllocator* port_allocator() { return port_allocator_; }
+  void set_port_allocator(cricket::PortAllocator* port_allocator) {
+    port_allocator_ = port_allocator;
+  }
+
+  AsyncDnsResolverFactoryInterface* async_dns_resolver_factory() {
+    return async_dns_resolver_factory_;
+  }
+  void set_async_dns_resolver_factory(
+      AsyncDnsResolverFactoryInterface* async_dns_resolver_factory) {
+    RTC_DCHECK(!async_resolver_factory_);
+    async_dns_resolver_factory_ = async_dns_resolver_factory;
+  }
+  AsyncResolverFactory* async_resolver_factory() {
+    return async_resolver_factory_;
+  }
+  ABSL_DEPRECATED("bugs.webrtc.org/12598")
+  void set_async_resolver_factory(
+      AsyncResolverFactory* async_resolver_factory) {
+    RTC_DCHECK(!async_dns_resolver_factory_);
+    async_resolver_factory_ = async_resolver_factory;
+  }
+
+  RtcEventLog* event_log() { return event_log_; }
+  void set_event_log(RtcEventLog* event_log) { event_log_ = event_log; }
+
+  void set_ice_controller_factory(
+      cricket::IceControllerFactoryInterface* ice_controller_factory) {
+    ice_controller_factory_ = ice_controller_factory;
+  }
+  cricket::IceControllerFactoryInterface* ice_controller_factory() {
+    return ice_controller_factory_;
+  }
+
+  // An active ICE controller actively manages the connection used by an ICE
+  // transport, in contrast with a legacy ICE controller that only picks the
+  // best connection to use or ping, and lets the transport decide when and
+  // whether to switch.
+  //
+  // Which ICE controller is used is determined based on the field trial
+  // "WebRTC-UseActiveIceController" as follows:
+  //
+  //   1. If the field trial is not enabled
+  //      a. The legacy ICE controller factory is used if one is supplied.
+  //      b. If not, a default ICE controller (BasicIceController) is
+  //      constructed and used.
+  //
+  //   2. If the field trial is enabled
+  //      a. If an active ICE controller factory is supplied, it is used and
+  //      the legacy ICE controller factory is not used.
+  //      b. If not, a default active ICE controller is used, wrapping over the
+  //      supplied or the default legacy ICE controller.
+  void set_active_ice_controller_factory(
+      cricket::ActiveIceControllerFactoryInterface*
+          active_ice_controller_factory) {
+    active_ice_controller_factory_ = active_ice_controller_factory;
+  }
+  cricket::ActiveIceControllerFactoryInterface*
+  active_ice_controller_factory() {
+    return active_ice_controller_factory_;
+  }
+
+  const FieldTrialsView* field_trials() { return field_trials_; }
+  void set_field_trials(const FieldTrialsView* field_trials) {
+    field_trials_ = field_trials;
+  }
+
+ private:
+  cricket::PortAllocator* port_allocator_ = nullptr;
+  AsyncDnsResolverFactoryInterface* async_dns_resolver_factory_ = nullptr;
+  // For backwards compatibility. Only one resolver factory can be set.
+  AsyncResolverFactory* async_resolver_factory_ = nullptr;
+  RtcEventLog* event_log_ = nullptr;
+  cricket::IceControllerFactoryInterface* ice_controller_factory_ = nullptr;
+  cricket::ActiveIceControllerFactoryInterface* active_ice_controller_factory_ =
+      nullptr;
+  const FieldTrialsView* field_trials_ = nullptr;
+  // TODO(https://crbug.com/webrtc/12657): Redesign to have const members.
+};
+
+// TODO(qingsi): The factory interface is defined in this file instead of its
+// namesake file ice_transport_factory.h to avoid the extra dependency on p2p/
+// introduced there by the p2p/-dependent factory methods. Move the factory
+// methods to a different file or rename it.
+class IceTransportFactory {
+ public:
+  virtual ~IceTransportFactory() = default;
+  // As a refcounted object, the returned ICE transport may outlive the host
+  // construct into which its reference is given, e.g. a peer connection. As a
+  // result, the returned ICE transport should not hold references to any object
+  // that the transport does not own and that has a lifetime bound to the host
+  // construct. Also, assumptions on the thread safety of the returned transport
+  // should be clarified by implementations. For example, a peer connection
+  // requires the returned transport to be constructed and destroyed on the
+  // network thread and an ICE transport factory that intends to work with a
+  // peer connection should offer transports compatible with these assumptions.
+  virtual rtc::scoped_refptr<IceTransportInterface> CreateIceTransport(
+      const std::string& transport_name,
+      int component,
+      IceTransportInit init) = 0;
+};
+
+}  // namespace webrtc
+#endif  // API_ICE_TRANSPORT_INTERFACE_H_