Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 803 insertions, 0 deletions

diff --git a/third_party/libwebrtc/rtc_base/units/BUILD.gn b/third_party/libwebrtc/rtc_base/units/BUILD.gn
new file mode 100644
index 0000000000..bbb87a009a
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/units/BUILD.gn
@@ -0,0 +1,34 @@
+# Copyright (c) 2018 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.
+
+import("../../webrtc.gni")
+
+rtc_source_set("unit_base") {
+  visibility = [
+    ":*",
+    "../../api/units:*",
+  ]
+  sources = [ "unit_base.h" ]
+
+  deps = [
+    "../../rtc_base:checks",
+    "../../rtc_base:divide_round",
+    "../../rtc_base:safe_conversions",
+  ]
+}
+
+if (rtc_include_tests) {
+  rtc_library("units_unittests") {
+    testonly = true
+    sources = [ "unit_base_unittest.cc" ]
+    deps = [
+      ":unit_base",
+      "../../test:test_support",
+    ]
+  }
+}
diff --git a/third_party/libwebrtc/rtc_base/units/OWNERS b/third_party/libwebrtc/rtc_base/units/OWNERS
new file mode 100644
index 0000000000..53e076b20b
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/units/OWNERS
@@ -0,0 +1 @@
+srte@webrtc.org
diff --git a/third_party/libwebrtc/rtc_base/units/unit_base.h b/third_party/libwebrtc/rtc_base/units/unit_base.h
new file mode 100644
index 0000000000..e8f8ec1956
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/units/unit_base.h
@@ -0,0 +1,312 @@
+/*
+ *  Copyright 2018 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 RTC_BASE_UNITS_UNIT_BASE_H_
+#define RTC_BASE_UNITS_UNIT_BASE_H_
+
+#include <stdint.h>
+
+#include <algorithm>
+#include <cmath>
+#include <limits>
+#include <type_traits>
+
+#include "rtc_base/checks.h"
+#include "rtc_base/numerics/divide_round.h"
+#include "rtc_base/numerics/safe_conversions.h"
+
+namespace webrtc {
+namespace rtc_units_impl {
+
+// UnitBase is a base class for implementing custom value types with a specific
+// unit. It provides type safety and commonly useful operations. The underlying
+// storage is always an int64_t, it's up to the unit implementation to choose
+// what scale it represents.
+//
+// It's used like:
+// class MyUnit: public UnitBase<MyUnit> {...};
+//
+// Unit_T is the subclass representing the specific unit.
+template <class Unit_T>
+class UnitBase {
+ public:
+  UnitBase() = delete;
+  static constexpr Unit_T Zero() { return Unit_T(0); }
+  static constexpr Unit_T PlusInfinity() { return Unit_T(PlusInfinityVal()); }
+  static constexpr Unit_T MinusInfinity() { return Unit_T(MinusInfinityVal()); }
+
+  constexpr bool IsZero() const { return value_ == 0; }
+  constexpr bool IsFinite() const { return !IsInfinite(); }
+  constexpr bool IsInfinite() const {
+    return value_ == PlusInfinityVal() || value_ == MinusInfinityVal();
+  }
+  constexpr bool IsPlusInfinity() const { return value_ == PlusInfinityVal(); }
+  constexpr bool IsMinusInfinity() const {
+    return value_ == MinusInfinityVal();
+  }
+
+  constexpr bool operator==(const UnitBase<Unit_T>& other) const {
+    return value_ == other.value_;
+  }
+  constexpr bool operator!=(const UnitBase<Unit_T>& other) const {
+    return value_ != other.value_;
+  }
+  constexpr bool operator<=(const UnitBase<Unit_T>& other) const {
+    return value_ <= other.value_;
+  }
+  constexpr bool operator>=(const UnitBase<Unit_T>& other) const {
+    return value_ >= other.value_;
+  }
+  constexpr bool operator>(const UnitBase<Unit_T>& other) const {
+    return value_ > other.value_;
+  }
+  constexpr bool operator<(const UnitBase<Unit_T>& other) const {
+    return value_ < other.value_;
+  }
+  constexpr Unit_T RoundTo(const Unit_T& resolution) const {
+    RTC_DCHECK(IsFinite());
+    RTC_DCHECK(resolution.IsFinite());
+    RTC_DCHECK_GT(resolution.value_, 0);
+    return Unit_T((value_ + resolution.value_ / 2) / resolution.value_) *
+           resolution.value_;
+  }
+  constexpr Unit_T RoundUpTo(const Unit_T& resolution) const {
+    RTC_DCHECK(IsFinite());
+    RTC_DCHECK(resolution.IsFinite());
+    RTC_DCHECK_GT(resolution.value_, 0);
+    return Unit_T((value_ + resolution.value_ - 1) / resolution.value_) *
+           resolution.value_;
+  }
+  constexpr Unit_T RoundDownTo(const Unit_T& resolution) const {
+    RTC_DCHECK(IsFinite());
+    RTC_DCHECK(resolution.IsFinite());
+    RTC_DCHECK_GT(resolution.value_, 0);
+    return Unit_T(value_ / resolution.value_) * resolution.value_;
+  }
+
+ protected:
+  template <
+      typename T,
+      typename std::enable_if<std::is_integral<T>::value>::type* = nullptr>
+  static constexpr Unit_T FromValue(T value) {
+    if (Unit_T::one_sided)
+      RTC_DCHECK_GE(value, 0);
+    RTC_DCHECK_GT(value, MinusInfinityVal());
+    RTC_DCHECK_LT(value, PlusInfinityVal());
+    return Unit_T(rtc::dchecked_cast<int64_t>(value));
+  }
+  template <typename T,
+            typename std::enable_if<std::is_floating_point<T>::value>::type* =
+                nullptr>
+  static constexpr Unit_T FromValue(T value) {
+    if (value == std::numeric_limits<T>::infinity()) {
+      return PlusInfinity();
+    } else if (value == -std::numeric_limits<T>::infinity()) {
+      return MinusInfinity();
+    } else {
+      RTC_DCHECK(!std::isnan(value));
+      return FromValue(rtc::dchecked_cast<int64_t>(value));
+    }
+  }
+
+  template <
+      typename T,
+      typename std::enable_if<std::is_integral<T>::value>::type* = nullptr>
+  static constexpr Unit_T FromFraction(int64_t denominator, T value) {
+    if (Unit_T::one_sided)
+      RTC_DCHECK_GE(value, 0);
+    RTC_DCHECK_GT(value, MinusInfinityVal() / denominator);
+    RTC_DCHECK_LT(value, PlusInfinityVal() / denominator);
+    return Unit_T(rtc::dchecked_cast<int64_t>(value * denominator));
+  }
+  template <typename T,
+            typename std::enable_if<std::is_floating_point<T>::value>::type* =
+                nullptr>
+  static constexpr Unit_T FromFraction(int64_t denominator, T value) {
+    return FromValue(value * denominator);
+  }
+
+  template <typename T = int64_t>
+  constexpr typename std::enable_if<std::is_integral<T>::value, T>::type
+  ToValue() const {
+    RTC_DCHECK(IsFinite());
+    return rtc::dchecked_cast<T>(value_);
+  }
+  template <typename T>
+  constexpr typename std::enable_if<std::is_floating_point<T>::value, T>::type
+  ToValue() const {
+    return IsPlusInfinity()
+               ? std::numeric_limits<T>::infinity()
+               : IsMinusInfinity() ? -std::numeric_limits<T>::infinity()
+                                   : value_;
+  }
+  template <typename T>
+  constexpr T ToValueOr(T fallback_value) const {
+    return IsFinite() ? value_ : fallback_value;
+  }
+
+  template <int64_t Denominator, typename T = int64_t>
+  constexpr typename std::enable_if<std::is_integral<T>::value, T>::type
+  ToFraction() const {
+    RTC_DCHECK(IsFinite());
+    return rtc::dchecked_cast<T>(DivideRoundToNearest(value_, Denominator));
+  }
+  template <int64_t Denominator, typename T>
+  constexpr typename std::enable_if<std::is_floating_point<T>::value, T>::type
+  ToFraction() const {
+    return ToValue<T>() * (1 / static_cast<T>(Denominator));
+  }
+
+  template <int64_t Denominator>
+  constexpr int64_t ToFractionOr(int64_t fallback_value) const {
+    return IsFinite() ? DivideRoundToNearest(value_, Denominator)
+                      : fallback_value;
+  }
+
+  template <int64_t Factor, typename T = int64_t>
+  constexpr typename std::enable_if<std::is_integral<T>::value, T>::type
+  ToMultiple() const {
+    RTC_DCHECK_GE(ToValue(), std::numeric_limits<T>::min() / Factor);
+    RTC_DCHECK_LE(ToValue(), std::numeric_limits<T>::max() / Factor);
+    return rtc::dchecked_cast<T>(ToValue() * Factor);
+  }
+  template <int64_t Factor, typename T>
+  constexpr typename std::enable_if<std::is_floating_point<T>::value, T>::type
+  ToMultiple() const {
+    return ToValue<T>() * Factor;
+  }
+
+  explicit constexpr UnitBase(int64_t value) : value_(value) {}
+
+ private:
+  template <class RelativeUnit_T>
+  friend class RelativeUnit;
+
+  static inline constexpr int64_t PlusInfinityVal() {
+    return std::numeric_limits<int64_t>::max();
+  }
+  static inline constexpr int64_t MinusInfinityVal() {
+    return std::numeric_limits<int64_t>::min();
+  }
+
+  constexpr Unit_T& AsSubClassRef() { return static_cast<Unit_T&>(*this); }
+  constexpr const Unit_T& AsSubClassRef() const {
+    return static_cast<const Unit_T&>(*this);
+  }
+
+  int64_t value_;
+};
+
+// Extends UnitBase to provide operations for relative units, that is, units
+// that have a meaningful relation between values such that a += b is a
+// sensible thing to do. For a,b <- same unit.
+template <class Unit_T>
+class RelativeUnit : public UnitBase<Unit_T> {
+ public:
+  constexpr Unit_T Clamped(Unit_T min_value, Unit_T max_value) const {
+    return std::max(min_value,
+                    std::min(UnitBase<Unit_T>::AsSubClassRef(), max_value));
+  }
+  constexpr void Clamp(Unit_T min_value, Unit_T max_value) {
+    *this = Clamped(min_value, max_value);
+  }
+  constexpr Unit_T operator+(const Unit_T other) const {
+    if (this->IsPlusInfinity() || other.IsPlusInfinity()) {
+      RTC_DCHECK(!this->IsMinusInfinity());
+      RTC_DCHECK(!other.IsMinusInfinity());
+      return this->PlusInfinity();
+    } else if (this->IsMinusInfinity() || other.IsMinusInfinity()) {
+      RTC_DCHECK(!this->IsPlusInfinity());
+      RTC_DCHECK(!other.IsPlusInfinity());
+      return this->MinusInfinity();
+    }
+    return UnitBase<Unit_T>::FromValue(this->ToValue() + other.ToValue());
+  }
+  constexpr Unit_T operator-(const Unit_T other) const {
+    if (this->IsPlusInfinity() || other.IsMinusInfinity()) {
+      RTC_DCHECK(!this->IsMinusInfinity());
+      RTC_DCHECK(!other.IsPlusInfinity());
+      return this->PlusInfinity();
+    } else if (this->IsMinusInfinity() || other.IsPlusInfinity()) {
+      RTC_DCHECK(!this->IsPlusInfinity());
+      RTC_DCHECK(!other.IsMinusInfinity());
+      return this->MinusInfinity();
+    }
+    return UnitBase<Unit_T>::FromValue(this->ToValue() - other.ToValue());
+  }
+  constexpr Unit_T& operator+=(const Unit_T other) {
+    *this = *this + other;
+    return this->AsSubClassRef();
+  }
+  constexpr Unit_T& operator-=(const Unit_T other) {
+    *this = *this - other;
+    return this->AsSubClassRef();
+  }
+  constexpr double operator/(const Unit_T other) const {
+    return UnitBase<Unit_T>::template ToValue<double>() /
+           other.template ToValue<double>();
+  }
+  template <typename T,
+            typename std::enable_if_t<std::is_floating_point_v<T>>* = nullptr>
+  constexpr Unit_T operator/(T scalar) const {
+    return UnitBase<Unit_T>::FromValue(std::llround(this->ToValue() / scalar));
+  }
+  template <typename T,
+            typename std::enable_if_t<std::is_integral_v<T>>* = nullptr>
+  constexpr Unit_T operator/(T scalar) const {
+    return UnitBase<Unit_T>::FromValue(this->ToValue() / scalar);
+  }
+  constexpr Unit_T operator*(double scalar) const {
+    return UnitBase<Unit_T>::FromValue(std::llround(this->ToValue() * scalar));
+  }
+  constexpr Unit_T operator*(int64_t scalar) const {
+    return UnitBase<Unit_T>::FromValue(this->ToValue() * scalar);
+  }
+  constexpr Unit_T operator*(int32_t scalar) const {
+    return UnitBase<Unit_T>::FromValue(this->ToValue() * scalar);
+  }
+  constexpr Unit_T operator*(size_t scalar) const {
+    return UnitBase<Unit_T>::FromValue(this->ToValue() * scalar);
+  }
+
+ protected:
+  using UnitBase<Unit_T>::UnitBase;
+};
+
+template <class Unit_T>
+inline constexpr Unit_T operator*(double scalar, RelativeUnit<Unit_T> other) {
+  return other * scalar;
+}
+template <class Unit_T>
+inline constexpr Unit_T operator*(int64_t scalar, RelativeUnit<Unit_T> other) {
+  return other * scalar;
+}
+template <class Unit_T>
+inline constexpr Unit_T operator*(int32_t scalar, RelativeUnit<Unit_T> other) {
+  return other * scalar;
+}
+template <class Unit_T>
+inline constexpr Unit_T operator*(size_t scalar, RelativeUnit<Unit_T> other) {
+  return other * scalar;
+}
+
+template <class Unit_T>
+inline constexpr Unit_T operator-(RelativeUnit<Unit_T> other) {
+  if (other.IsPlusInfinity())
+    return UnitBase<Unit_T>::MinusInfinity();
+  if (other.IsMinusInfinity())
+    return UnitBase<Unit_T>::PlusInfinity();
+  return -1 * other;
+}
+
+}  // namespace rtc_units_impl
+
+}  // namespace webrtc
+
+#endif  // RTC_BASE_UNITS_UNIT_BASE_H_
diff --git a/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build b/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build
new file mode 100644
index 0000000000..35e3af0767
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build
@@ -0,0 +1,205 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+  ### This moz.build was AUTOMATICALLY GENERATED from a GN config,  ###
+  ### DO NOT edit it by hand.                                       ###
+
+COMPILE_FLAGS["OS_INCLUDES"] = []
+AllowCompilerWarnings()
+
+DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
+DEFINES["RTC_DAV1D_IN_INTERNAL_DECODER_FACTORY"] = True
+DEFINES["RTC_ENABLE_VP9"] = True
+DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
+DEFINES["WEBRTC_LIBRARY_IMPL"] = True
+DEFINES["WEBRTC_MOZILLA_BUILD"] = True
+DEFINES["WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS"] = "0"
+DEFINES["WEBRTC_STRICT_FIELD_TRIALS"] = "0"
+
+FINAL_LIBRARY = "webrtc"
+
+
+LOCAL_INCLUDES += [
+    "!/ipc/ipdl/_ipdlheaders",
+    "!/third_party/libwebrtc/gen",
+    "/ipc/chromium/src",
+    "/third_party/libwebrtc/",
+    "/third_party/libwebrtc/third_party/abseil-cpp/",
+    "/tools/profiler/public"
+]
+
+if not CONFIG["MOZ_DEBUG"]:
+
+    DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "0"
+    DEFINES["NDEBUG"] = True
+    DEFINES["NVALGRIND"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1":
+
+    DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
+
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r22_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+    DEFINES["WEBRTC_LINUX"] = True
+    DEFINES["WEBRTC_POSIX"] = True
+    DEFINES["_GNU_SOURCE"] = True
+    DEFINES["__STDC_CONSTANT_MACROS"] = True
+    DEFINES["__STDC_FORMAT_MACROS"] = True
+
+    OS_LIBS += [
+        "log"
+    ]
+
+if CONFIG["OS_TARGET"] == "Darwin":
+
+    DEFINES["WEBRTC_MAC"] = True
+    DEFINES["WEBRTC_POSIX"] = True
+    DEFINES["_LIBCPP_HAS_NO_ALIGNED_ALLOCATION"] = True
+    DEFINES["__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES"] = "0"
+    DEFINES["__STDC_CONSTANT_MACROS"] = True
+    DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["WEBRTC_LINUX"] = True
+    DEFINES["WEBRTC_POSIX"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+    DEFINES["__STDC_CONSTANT_MACROS"] = True
+    DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "OpenBSD":
+
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_BSD"] = True
+    DEFINES["WEBRTC_POSIX"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+    DEFINES["__STDC_CONSTANT_MACROS"] = True
+    DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "WINNT":
+
+    DEFINES["CERT_CHAIN_PARA_HAS_EXTRA_FIELDS"] = True
+    DEFINES["NOMINMAX"] = True
+    DEFINES["NTDDI_VERSION"] = "0x0A000000"
+    DEFINES["PSAPI_VERSION"] = "2"
+    DEFINES["UNICODE"] = True
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["WEBRTC_WIN"] = True
+    DEFINES["WIN32"] = True
+    DEFINES["WIN32_LEAN_AND_MEAN"] = True
+    DEFINES["WINAPI_FAMILY"] = "WINAPI_FAMILY_DESKTOP_APP"
+    DEFINES["WINVER"] = "0x0A00"
+    DEFINES["_ATL_NO_OPENGL"] = True
+    DEFINES["_CRT_RAND_S"] = True
+    DEFINES["_CRT_SECURE_NO_DEPRECATE"] = True
+    DEFINES["_ENABLE_EXTENDED_ALIGNED_STORAGE"] = True
+    DEFINES["_HAS_EXCEPTIONS"] = "0"
+    DEFINES["_HAS_NODISCARD"] = True
+    DEFINES["_SCL_SECURE_NO_DEPRECATE"] = True
+    DEFINES["_SECURE_ATL"] = True
+    DEFINES["_UNICODE"] = True
+    DEFINES["_WIN32_WINNT"] = "0x0A00"
+    DEFINES["_WINDOWS"] = True
+    DEFINES["__STD_C"] = True
+
+if CONFIG["CPU_ARCH"] == "aarch64":
+
+    DEFINES["WEBRTC_ARCH_ARM64"] = True
+    DEFINES["WEBRTC_HAS_NEON"] = True
+
+if CONFIG["CPU_ARCH"] == "arm":
+
+    DEFINES["WEBRTC_ARCH_ARM"] = True
+    DEFINES["WEBRTC_ARCH_ARM_V7"] = True
+    DEFINES["WEBRTC_HAS_NEON"] = True
+
+if CONFIG["CPU_ARCH"] == "mips32":
+
+    DEFINES["MIPS32_LE"] = True
+    DEFINES["MIPS_FPU_LE"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "mips64":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86":
+
+    DEFINES["WEBRTC_ENABLE_AVX2"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64":
+
+    DEFINES["WEBRTC_ENABLE_AVX2"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "OpenBSD":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
+
+    DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support"
+    ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+Library("unit_base_gn")
diff --git a/third_party/libwebrtc/rtc_base/units/unit_base_unittest.cc b/third_party/libwebrtc/rtc_base/units/unit_base_unittest.cc
new file mode 100644
index 0000000000..258d7d1268
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/units/unit_base_unittest.cc
@@ -0,0 +1,251 @@
+/*
+ *  Copyright (c) 2018 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.
+ */
+
+#include "rtc_base/units/unit_base.h"
+
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+class TestUnit final : public rtc_units_impl::RelativeUnit<TestUnit> {
+ public:
+  TestUnit() = delete;
+
+  using UnitBase::FromValue;
+  using UnitBase::ToValue;
+  using UnitBase::ToValueOr;
+
+  template <typename T>
+  static constexpr TestUnit FromKilo(T kilo) {
+    return FromFraction(1000, kilo);
+  }
+  template <typename T = int64_t>
+  T ToKilo() const {
+    return UnitBase::ToFraction<1000, T>();
+  }
+  constexpr int64_t ToKiloOr(int64_t fallback) const {
+    return UnitBase::ToFractionOr<1000>(fallback);
+  }
+  template <typename T>
+  constexpr T ToMilli() const {
+    return UnitBase::ToMultiple<1000, T>();
+  }
+
+ private:
+  friend class rtc_units_impl::UnitBase<TestUnit>;
+  static constexpr bool one_sided = false;
+  using RelativeUnit<TestUnit>::RelativeUnit;
+};
+constexpr TestUnit TestUnitAddKilo(TestUnit value, int add_kilo) {
+  value += TestUnit::FromKilo(add_kilo);
+  return value;
+}
+}  // namespace
+namespace test {
+TEST(UnitBaseTest, ConstExpr) {
+  constexpr int64_t kValue = -12345;
+  constexpr TestUnit kTestUnitZero = TestUnit::Zero();
+  constexpr TestUnit kTestUnitPlusInf = TestUnit::PlusInfinity();
+  constexpr TestUnit kTestUnitMinusInf = TestUnit::MinusInfinity();
+  static_assert(kTestUnitZero.IsZero(), "");
+  static_assert(kTestUnitPlusInf.IsPlusInfinity(), "");
+  static_assert(kTestUnitMinusInf.IsMinusInfinity(), "");
+  static_assert(kTestUnitPlusInf.ToKiloOr(-1) == -1, "");
+
+  static_assert(kTestUnitPlusInf > kTestUnitZero, "");
+
+  constexpr TestUnit kTestUnitKilo = TestUnit::FromKilo(kValue);
+  constexpr TestUnit kTestUnitValue = TestUnit::FromValue(kValue);
+
+  static_assert(kTestUnitKilo.ToKiloOr(0) == kValue, "");
+  static_assert(kTestUnitValue.ToValueOr(0) == kValue, "");
+  static_assert(TestUnitAddKilo(kTestUnitValue, 2).ToValue() == kValue + 2000,
+                "");
+  static_assert(TestUnit::FromValue(500) / 2 == TestUnit::FromValue(250));
+}
+
+TEST(UnitBaseTest, GetBackSameValues) {
+  const int64_t kValue = 499;
+  for (int sign = -1; sign <= 1; ++sign) {
+    int64_t value = kValue * sign;
+    EXPECT_EQ(TestUnit::FromKilo(value).ToKilo(), value);
+    EXPECT_EQ(TestUnit::FromValue(value).ToValue<int64_t>(), value);
+  }
+  EXPECT_EQ(TestUnit::Zero().ToValue<int64_t>(), 0);
+}
+
+TEST(UnitBaseTest, GetDifferentPrefix) {
+  const int64_t kValue = 3000000;
+  EXPECT_EQ(TestUnit::FromValue(kValue).ToKilo(), kValue / 1000);
+  EXPECT_EQ(TestUnit::FromKilo(kValue).ToValue<int64_t>(), kValue * 1000);
+}
+
+TEST(UnitBaseTest, IdentityChecks) {
+  const int64_t kValue = 3000;
+  EXPECT_TRUE(TestUnit::Zero().IsZero());
+  EXPECT_FALSE(TestUnit::FromKilo(kValue).IsZero());
+
+  EXPECT_TRUE(TestUnit::PlusInfinity().IsInfinite());
+  EXPECT_TRUE(TestUnit::MinusInfinity().IsInfinite());
+  EXPECT_FALSE(TestUnit::Zero().IsInfinite());
+  EXPECT_FALSE(TestUnit::FromKilo(-kValue).IsInfinite());
+  EXPECT_FALSE(TestUnit::FromKilo(kValue).IsInfinite());
+
+  EXPECT_FALSE(TestUnit::PlusInfinity().IsFinite());
+  EXPECT_FALSE(TestUnit::MinusInfinity().IsFinite());
+  EXPECT_TRUE(TestUnit::FromKilo(-kValue).IsFinite());
+  EXPECT_TRUE(TestUnit::FromKilo(kValue).IsFinite());
+  EXPECT_TRUE(TestUnit::Zero().IsFinite());
+
+  EXPECT_TRUE(TestUnit::PlusInfinity().IsPlusInfinity());
+  EXPECT_FALSE(TestUnit::MinusInfinity().IsPlusInfinity());
+
+  EXPECT_TRUE(TestUnit::MinusInfinity().IsMinusInfinity());
+  EXPECT_FALSE(TestUnit::PlusInfinity().IsMinusInfinity());
+}
+
+TEST(UnitBaseTest, ComparisonOperators) {
+  const int64_t kSmall = 450;
+  const int64_t kLarge = 451;
+  const TestUnit small = TestUnit::FromKilo(kSmall);
+  const TestUnit large = TestUnit::FromKilo(kLarge);
+
+  EXPECT_EQ(TestUnit::Zero(), TestUnit::FromKilo(0));
+  EXPECT_EQ(TestUnit::PlusInfinity(), TestUnit::PlusInfinity());
+  EXPECT_EQ(small, TestUnit::FromKilo(kSmall));
+  EXPECT_LE(small, TestUnit::FromKilo(kSmall));
+  EXPECT_GE(small, TestUnit::FromKilo(kSmall));
+  EXPECT_NE(small, TestUnit::FromKilo(kLarge));
+  EXPECT_LE(small, TestUnit::FromKilo(kLarge));
+  EXPECT_LT(small, TestUnit::FromKilo(kLarge));
+  EXPECT_GE(large, TestUnit::FromKilo(kSmall));
+  EXPECT_GT(large, TestUnit::FromKilo(kSmall));
+  EXPECT_LT(TestUnit::Zero(), small);
+  EXPECT_GT(TestUnit::Zero(), TestUnit::FromKilo(-kSmall));
+  EXPECT_GT(TestUnit::Zero(), TestUnit::FromKilo(-kSmall));
+
+  EXPECT_GT(TestUnit::PlusInfinity(), large);
+  EXPECT_LT(TestUnit::MinusInfinity(), TestUnit::Zero());
+}
+
+TEST(UnitBaseTest, Clamping) {
+  const TestUnit upper = TestUnit::FromKilo(800);
+  const TestUnit lower = TestUnit::FromKilo(100);
+  const TestUnit under = TestUnit::FromKilo(100);
+  const TestUnit inside = TestUnit::FromKilo(500);
+  const TestUnit over = TestUnit::FromKilo(1000);
+  EXPECT_EQ(under.Clamped(lower, upper), lower);
+  EXPECT_EQ(inside.Clamped(lower, upper), inside);
+  EXPECT_EQ(over.Clamped(lower, upper), upper);
+
+  TestUnit mutable_delta = lower;
+  mutable_delta.Clamp(lower, upper);
+  EXPECT_EQ(mutable_delta, lower);
+  mutable_delta = inside;
+  mutable_delta.Clamp(lower, upper);
+  EXPECT_EQ(mutable_delta, inside);
+  mutable_delta = over;
+  mutable_delta.Clamp(lower, upper);
+  EXPECT_EQ(mutable_delta, upper);
+}
+
+TEST(UnitBaseTest, CanBeInititializedFromLargeInt) {
+  const int kMaxInt = std::numeric_limits<int>::max();
+  EXPECT_EQ(TestUnit::FromKilo(kMaxInt).ToValue<int64_t>(),
+            static_cast<int64_t>(kMaxInt) * 1000);
+}
+
+TEST(UnitBaseTest, ConvertsToAndFromDouble) {
+  const int64_t kValue = 17017;
+  const double kMilliDouble = kValue * 1e3;
+  const double kValueDouble = kValue;
+  const double kKiloDouble = kValue * 1e-3;
+
+  EXPECT_EQ(TestUnit::FromValue(kValue).ToKilo<double>(), kKiloDouble);
+  EXPECT_EQ(TestUnit::FromKilo(kKiloDouble).ToValue<int64_t>(), kValue);
+
+  EXPECT_EQ(TestUnit::FromValue(kValue).ToValue<double>(), kValueDouble);
+  EXPECT_EQ(TestUnit::FromValue(kValueDouble).ToValue<int64_t>(), kValue);
+
+  EXPECT_NEAR(TestUnit::FromValue(kValue).ToMilli<double>(), kMilliDouble, 1);
+
+  const double kPlusInfinity = std::numeric_limits<double>::infinity();
+  const double kMinusInfinity = -kPlusInfinity;
+
+  EXPECT_EQ(TestUnit::PlusInfinity().ToKilo<double>(), kPlusInfinity);
+  EXPECT_EQ(TestUnit::MinusInfinity().ToKilo<double>(), kMinusInfinity);
+  EXPECT_EQ(TestUnit::PlusInfinity().ToValue<double>(), kPlusInfinity);
+  EXPECT_EQ(TestUnit::MinusInfinity().ToValue<double>(), kMinusInfinity);
+  EXPECT_EQ(TestUnit::PlusInfinity().ToMilli<double>(), kPlusInfinity);
+  EXPECT_EQ(TestUnit::MinusInfinity().ToMilli<double>(), kMinusInfinity);
+
+  EXPECT_TRUE(TestUnit::FromKilo(kPlusInfinity).IsPlusInfinity());
+  EXPECT_TRUE(TestUnit::FromKilo(kMinusInfinity).IsMinusInfinity());
+  EXPECT_TRUE(TestUnit::FromValue(kPlusInfinity).IsPlusInfinity());
+  EXPECT_TRUE(TestUnit::FromValue(kMinusInfinity).IsMinusInfinity());
+}
+
+TEST(UnitBaseTest, MathOperations) {
+  const int64_t kValueA = 267;
+  const int64_t kValueB = 450;
+  const TestUnit delta_a = TestUnit::FromKilo(kValueA);
+  const TestUnit delta_b = TestUnit::FromKilo(kValueB);
+  EXPECT_EQ((delta_a + delta_b).ToKilo(), kValueA + kValueB);
+  EXPECT_EQ((delta_a - delta_b).ToKilo(), kValueA - kValueB);
+
+  const int32_t kInt32Value = 123;
+  const double kFloatValue = 123.0;
+  EXPECT_EQ((TestUnit::FromValue(kValueA) * kValueB).ToValue<int64_t>(),
+            kValueA * kValueB);
+  EXPECT_EQ((TestUnit::FromValue(kValueA) * kInt32Value).ToValue<int64_t>(),
+            kValueA * kInt32Value);
+  EXPECT_EQ((TestUnit::FromValue(kValueA) * kFloatValue).ToValue<int64_t>(),
+            kValueA * kFloatValue);
+
+  EXPECT_EQ((delta_b / 10).ToKilo(), kValueB / 10);
+  EXPECT_EQ(delta_b / delta_a, static_cast<double>(kValueB) / kValueA);
+
+  TestUnit mutable_delta = TestUnit::FromKilo(kValueA);
+  mutable_delta += TestUnit::FromKilo(kValueB);
+  EXPECT_EQ(mutable_delta, TestUnit::FromKilo(kValueA + kValueB));
+  mutable_delta -= TestUnit::FromKilo(kValueB);
+  EXPECT_EQ(mutable_delta, TestUnit::FromKilo(kValueA));
+
+  // Division by an int rounds towards zero to follow regular int division.
+  EXPECT_EQ(TestUnit::FromValue(789) / 10, TestUnit::FromValue(78));
+  EXPECT_EQ(TestUnit::FromValue(-789) / 10, TestUnit::FromValue(-78));
+}
+
+TEST(UnitBaseTest, InfinityOperations) {
+  const int64_t kValue = 267;
+  const TestUnit finite = TestUnit::FromKilo(kValue);
+  EXPECT_TRUE((TestUnit::PlusInfinity() + finite).IsPlusInfinity());
+  EXPECT_TRUE((TestUnit::PlusInfinity() - finite).IsPlusInfinity());
+  EXPECT_TRUE((finite + TestUnit::PlusInfinity()).IsPlusInfinity());
+  EXPECT_TRUE((finite - TestUnit::MinusInfinity()).IsPlusInfinity());
+
+  EXPECT_TRUE((TestUnit::MinusInfinity() + finite).IsMinusInfinity());
+  EXPECT_TRUE((TestUnit::MinusInfinity() - finite).IsMinusInfinity());
+  EXPECT_TRUE((finite + TestUnit::MinusInfinity()).IsMinusInfinity());
+  EXPECT_TRUE((finite - TestUnit::PlusInfinity()).IsMinusInfinity());
+}
+
+TEST(UnitBaseTest, UnaryMinus) {
+  const int64_t kValue = 1337;
+  const TestUnit unit = TestUnit::FromValue(kValue);
+  EXPECT_EQ(-unit.ToValue(), -kValue);
+
+  // Check infinity.
+  EXPECT_EQ(-TestUnit::PlusInfinity(), TestUnit::MinusInfinity());
+  EXPECT_EQ(-TestUnit::MinusInfinity(), TestUnit::PlusInfinity());
+}
+
+}  // namespace test
+}  // namespace webrtc