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diff --git a/third_party/libwebrtc/p2p/base/transport_description.h b/third_party/libwebrtc/p2p/base/transport_description.h
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+/*
+ *  Copyright 2012 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 P2P_BASE_TRANSPORT_DESCRIPTION_H_
+#define P2P_BASE_TRANSPORT_DESCRIPTION_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "absl/algorithm/container.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "api/rtc_error.h"
+#include "p2p/base/p2p_constants.h"
+#include "rtc_base/ssl_fingerprint.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace cricket {
+
+// SEC_ENABLED and SEC_REQUIRED should only be used if the session
+// was negotiated over TLS, to protect the inline crypto material
+// exchange.
+// SEC_DISABLED: No crypto in outgoing offer, ignore any supplied crypto.
+// SEC_ENABLED:  Crypto in outgoing offer and answer (if supplied in offer).
+// SEC_REQUIRED: Crypto in outgoing offer and answer. Fail any offer with absent
+//               or unsupported crypto.
+// TODO(deadbeef): Remove this or rename it to something more appropriate, like
+// SdesPolicy.
+enum SecurePolicy { SEC_DISABLED, SEC_ENABLED, SEC_REQUIRED };
+
+// Whether our side of the call is driving the negotiation, or the other side.
+enum IceRole { ICEROLE_CONTROLLING = 0, ICEROLE_CONTROLLED, ICEROLE_UNKNOWN };
+
+// ICE RFC 5245 implementation type.
+enum IceMode {
+  ICEMODE_FULL,  // As defined in http://tools.ietf.org/html/rfc5245#section-4.1
+  ICEMODE_LITE   // As defined in http://tools.ietf.org/html/rfc5245#section-4.2
+};
+
+// RFC 4145 - http://tools.ietf.org/html/rfc4145#section-4
+// 'active':  The endpoint will initiate an outgoing connection.
+// 'passive': The endpoint will accept an incoming connection.
+// 'actpass': The endpoint is willing to accept an incoming
+//            connection or to initiate an outgoing connection.
+enum ConnectionRole {
+  CONNECTIONROLE_NONE = 0,
+  CONNECTIONROLE_ACTIVE,
+  CONNECTIONROLE_PASSIVE,
+  CONNECTIONROLE_ACTPASS,
+  CONNECTIONROLE_HOLDCONN,
+};
+
+struct IceParameters {
+  // Constructs an IceParameters from a user-provided ufrag/pwd combination.
+  // Returns a SyntaxError if the ufrag or pwd are malformed.
+  static RTC_EXPORT webrtc::RTCErrorOr<IceParameters> Parse(
+      absl::string_view raw_ufrag,
+      absl::string_view raw_pwd);
+
+  // TODO(honghaiz): Include ICE mode in this structure to match the ORTC
+  // struct:
+  // http://ortc.org/wp-content/uploads/2016/03/ortc.html#idl-def-RTCIceParameters
+  std::string ufrag;
+  std::string pwd;
+  bool renomination = false;
+  IceParameters() = default;
+  IceParameters(absl::string_view ice_ufrag,
+                absl::string_view ice_pwd,
+                bool ice_renomination)
+      : ufrag(ice_ufrag), pwd(ice_pwd), renomination(ice_renomination) {}
+
+  bool operator==(const IceParameters& other) const {
+    return ufrag == other.ufrag && pwd == other.pwd &&
+           renomination == other.renomination;
+  }
+  bool operator!=(const IceParameters& other) const {
+    return !(*this == other);
+  }
+
+  // Validate IceParameters, returns a SyntaxError if the ufrag or pwd are
+  // malformed.
+  webrtc::RTCError Validate() const;
+};
+
+extern const char CONNECTIONROLE_ACTIVE_STR[];
+extern const char CONNECTIONROLE_PASSIVE_STR[];
+extern const char CONNECTIONROLE_ACTPASS_STR[];
+extern const char CONNECTIONROLE_HOLDCONN_STR[];
+
+constexpr auto* ICE_OPTION_TRICKLE = "trickle";
+constexpr auto* ICE_OPTION_RENOMINATION = "renomination";
+
+absl::optional<ConnectionRole> StringToConnectionRole(
+    absl::string_view role_str);
+bool ConnectionRoleToString(const ConnectionRole& role, std::string* role_str);
+
+struct TransportDescription {
+  TransportDescription();
+  TransportDescription(const std::vector<std::string>& transport_options,
+                       absl::string_view ice_ufrag,
+                       absl::string_view ice_pwd,
+                       IceMode ice_mode,
+                       ConnectionRole role,
+                       const rtc::SSLFingerprint* identity_fingerprint);
+  TransportDescription(absl::string_view ice_ufrag, absl::string_view ice_pwd);
+  TransportDescription(const TransportDescription& from);
+  ~TransportDescription();
+
+  TransportDescription& operator=(const TransportDescription& from);
+
+  // TODO(deadbeef): Rename to HasIceOption, etc.
+  bool HasOption(absl::string_view option) const {
+    return absl::c_linear_search(transport_options, option);
+  }
+  void AddOption(absl::string_view option) {
+    transport_options.emplace_back(option);
+  }
+  bool secure() const { return identity_fingerprint != nullptr; }
+
+  IceParameters GetIceParameters() const {
+    return IceParameters(ice_ufrag, ice_pwd,
+                         HasOption(ICE_OPTION_RENOMINATION));
+  }
+
+  static rtc::SSLFingerprint* CopyFingerprint(const rtc::SSLFingerprint* from) {
+    if (!from)
+      return NULL;
+
+    return new rtc::SSLFingerprint(*from);
+  }
+
+  // These are actually ICE options (appearing in the ice-options attribute in
+  // SDP).
+  // TODO(deadbeef): Rename to ice_options.
+  std::vector<std::string> transport_options;
+  std::string ice_ufrag;
+  std::string ice_pwd;
+  IceMode ice_mode;
+  ConnectionRole connection_role;
+
+  std::unique_ptr<rtc::SSLFingerprint> identity_fingerprint;
+};
+
+}  // namespace cricket
+
+#endif  // P2P_BASE_TRANSPORT_DESCRIPTION_H_