Bump to WebRTC M120 release

Some API deprecation -- ExperimentalAgc and ExperimentalNs are gone.
We're continuing to carry iSAC even though it's gone upstream, but maybe
we'll want to drop that soon.

webrtc/rtc_base/numerics/divide_round.h

@@ -0,0 +1,60 @@
+/*
+ *  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 RTC_BASE_NUMERICS_DIVIDE_ROUND_H_
+#define RTC_BASE_NUMERICS_DIVIDE_ROUND_H_
+
+#include <type_traits>
+
+#include "rtc_base/checks.h"
+#include "rtc_base/numerics/safe_compare.h"
+
+namespace webrtc {
+
+template <typename Dividend, typename Divisor>
+inline auto constexpr DivideRoundUp(Dividend dividend, Divisor divisor) {
+  static_assert(std::is_integral<Dividend>(), "");
+  static_assert(std::is_integral<Divisor>(), "");
+  RTC_DCHECK_GE(dividend, 0);
+  RTC_DCHECK_GT(divisor, 0);
+
+  auto quotient = dividend / divisor;
+  auto remainder = dividend % divisor;
+  return quotient + (remainder > 0 ? 1 : 0);
+}
+
+template <typename Dividend, typename Divisor>
+inline auto constexpr DivideRoundToNearest(Dividend dividend, Divisor divisor) {
+  static_assert(std::is_integral<Dividend>(), "");
+  static_assert(std::is_integral<Divisor>(), "");
+  RTC_DCHECK_GT(divisor, 0);
+
+  if (dividend < Dividend{0}) {
+    auto half_of_divisor = divisor / 2;
+    auto quotient = dividend / divisor;
+    auto remainder = dividend % divisor;
+    if (rtc::SafeGt(-remainder, half_of_divisor)) {
+      --quotient;
+    }
+    return quotient;
+  }
+
+  auto half_of_divisor = (divisor - 1) / 2;
+  auto quotient = dividend / divisor;
+  auto remainder = dividend % divisor;
+  if (rtc::SafeGt(remainder, half_of_divisor)) {
+    ++quotient;
+  }
+  return quotient;
+}
+
+}  // namespace webrtc
+
+#endif  // RTC_BASE_NUMERICS_DIVIDE_ROUND_H_

webrtc/rtc_base/numerics/safe_conversions.h

@@ -63,12 +63,10 @@ inline constexpr Dst saturated_cast(Src value) {
 
     // Should fail only on attempting to assign NaN to a saturated integer.
     case internal::TYPE_INVALID:
-      FATAL();
-      return std::numeric_limits<Dst>::max();
+      RTC_CHECK_NOTREACHED();
   }
 
-  FATAL();
-  return static_cast<Dst>(value);
+  RTC_CHECK_NOTREACHED();
 }
 
 }  // namespace rtc

webrtc/rtc_base/numerics/safe_minmax.h

@@ -325,9 +325,9 @@ R2 SafeClamp(T x, L min, H max) {
   static_assert(IsIntlike<L>::value || std::is_floating_point<L>::value,
                 "The third argument must be integral or floating-point");
   RTC_DCHECK_LE(min, max);
-  return SafeLe(x, min)
-             ? static_cast<R2>(min)
-             : SafeGe(x, max) ? static_cast<R2>(max) : static_cast<R2>(x);
+  return SafeLe(x, min)   ? static_cast<R2>(min)
+         : SafeGe(x, max) ? static_cast<R2>(max)
+                          : static_cast<R2>(x);
 }
 
 }  // namespace rtc