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diff --git a/third_party/abseil_cpp/absl/random/internal/randen_slow.h b/third_party/abseil_cpp/absl/random/internal/randen_slow.h
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+++ b/third_party/abseil_cpp/absl/random/internal/randen_slow.h
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+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_
+#define ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_
+
+#include <cstddef>
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace random_internal {
+
+// RANDen = RANDom generator or beetroots in Swiss German.
+// RandenSlow implements the basic state manipulation methods for
+// architectures lacking AES hardware acceleration intrinsics.
+class RandenSlow {
+ public:
+  static void Generate(const void* keys, void* state_void);
+  static void Absorb(const void* seed_void, void* state_void);
+  static const void* GetKeys();
+};
+
+}  // namespace random_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_