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diff --git a/third_party/libwebrtc/net/dcsctp/public/types.h b/third_party/libwebrtc/net/dcsctp/public/types.h
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+/*
+ *  Copyright 2019 The Chromium Authors. All rights reserved.
+ *  Copyright (c) 2021 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 NET_DCSCTP_PUBLIC_TYPES_H_
+#define NET_DCSCTP_PUBLIC_TYPES_H_
+
+#include <cstdint>
+#include <limits>
+
+#include "rtc_base/strong_alias.h"
+
+namespace dcsctp {
+
+// Stream Identifier
+using StreamID = webrtc::StrongAlias<class StreamIDTag, uint16_t>;
+
+// Payload Protocol Identifier (PPID)
+using PPID = webrtc::StrongAlias<class PPIDTag, uint32_t>;
+
+// Timeout Identifier
+using TimeoutID = webrtc::StrongAlias<class TimeoutTag, uint64_t>;
+
+// Indicates if a message is allowed to be received out-of-order compared to
+// other messages on the same stream.
+using IsUnordered = webrtc::StrongAlias<class IsUnorderedTag, bool>;
+
+// Stream priority, where higher values indicate higher priority. The meaning of
+// this value and how it's used depends on the stream scheduler.
+using StreamPriority = webrtc::StrongAlias<class StreamPriorityTag, uint16_t>;
+
+// Duration, as milliseconds. Overflows after 24 days.
+class DurationMs : public webrtc::StrongAlias<class DurationMsTag, int32_t> {
+ public:
+  constexpr explicit DurationMs(const UnderlyingType& v)
+      : webrtc::StrongAlias<class DurationMsTag, int32_t>(v) {}
+
+  // Convenience methods for working with time.
+  constexpr DurationMs& operator+=(DurationMs d) {
+    value_ += d.value_;
+    return *this;
+  }
+  constexpr DurationMs& operator-=(DurationMs d) {
+    value_ -= d.value_;
+    return *this;
+  }
+  template <typename T>
+  constexpr DurationMs& operator*=(T factor) {
+    value_ *= factor;
+    return *this;
+  }
+};
+
+constexpr inline DurationMs operator+(DurationMs lhs, DurationMs rhs) {
+  return lhs += rhs;
+}
+constexpr inline DurationMs operator-(DurationMs lhs, DurationMs rhs) {
+  return lhs -= rhs;
+}
+template <typename T>
+constexpr inline DurationMs operator*(DurationMs lhs, T rhs) {
+  return lhs *= rhs;
+}
+template <typename T>
+constexpr inline DurationMs operator*(T lhs, DurationMs rhs) {
+  return rhs *= lhs;
+}
+constexpr inline int32_t operator/(DurationMs lhs, DurationMs rhs) {
+  return lhs.value() / rhs.value();
+}
+
+// Represents time, in milliseconds since a client-defined epoch.
+class TimeMs : public webrtc::StrongAlias<class TimeMsTag, int64_t> {
+ public:
+  constexpr explicit TimeMs(const UnderlyingType& v)
+      : webrtc::StrongAlias<class TimeMsTag, int64_t>(v) {}
+
+  // Convenience methods for working with time.
+  constexpr TimeMs& operator+=(DurationMs d) {
+    value_ += *d;
+    return *this;
+  }
+  constexpr TimeMs& operator-=(DurationMs d) {
+    value_ -= *d;
+    return *this;
+  }
+
+  static constexpr TimeMs InfiniteFuture() {
+    return TimeMs(std::numeric_limits<int64_t>::max());
+  }
+};
+
+constexpr inline TimeMs operator+(TimeMs lhs, DurationMs rhs) {
+  return lhs += rhs;
+}
+constexpr inline TimeMs operator+(DurationMs lhs, TimeMs rhs) {
+  return rhs += lhs;
+}
+constexpr inline TimeMs operator-(TimeMs lhs, DurationMs rhs) {
+  return lhs -= rhs;
+}
+constexpr inline DurationMs operator-(TimeMs lhs, TimeMs rhs) {
+  return DurationMs(*lhs - *rhs);
+}
+
+// The maximum number of times the socket should attempt to retransmit a
+// message which fails the first time in unreliable mode.
+class MaxRetransmits
+    : public webrtc::StrongAlias<class MaxRetransmitsTag, uint16_t> {
+ public:
+  constexpr explicit MaxRetransmits(const UnderlyingType& v)
+      : webrtc::StrongAlias<class MaxRetransmitsTag, uint16_t>(v) {}
+
+  // There should be no limit - the message should be sent reliably.
+  static constexpr MaxRetransmits NoLimit() {
+    return MaxRetransmits(std::numeric_limits<uint16_t>::max());
+  }
+};
+
+// An identifier that can be set on sent messages, and picked by the sending
+// client. If different from `::NotSet()`, lifecycle events will be generated,
+// and eventually `DcSctpSocketCallbacks::OnLifecycleEnd` will be called to
+// indicate that the lifecycle isn't tracked any longer. The value zero (0) is
+// not a valid lifecycle identifier, and will be interpreted as not having it
+// set.
+class LifecycleId : public webrtc::StrongAlias<class LifecycleIdTag, uint64_t> {
+ public:
+  constexpr explicit LifecycleId(const UnderlyingType& v)
+      : webrtc::StrongAlias<class LifecycleIdTag, uint64_t>(v) {}
+
+  constexpr bool IsSet() const { return value_ != 0; }
+
+  static constexpr LifecycleId NotSet() { return LifecycleId(0); }
+};
+}  // namespace dcsctp
+
+#endif  // NET_DCSCTP_PUBLIC_TYPES_H_