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diff --git a/security/sandbox/chromium/base/rand_util.h b/security/sandbox/chromium/base/rand_util.h
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+++ b/security/sandbox/chromium/base/rand_util.h
@@ -0,0 +1,62 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_RAND_UTIL_H_
+#define BASE_RAND_UTIL_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+
+#include "base/base_export.h"
+#include "build/build_config.h"
+
+namespace base {
+
+// Returns a random number in range [0, UINT64_MAX]. Thread-safe.
+BASE_EXPORT uint64_t RandUint64();
+
+// Returns a random number between min and max (inclusive). Thread-safe.
+BASE_EXPORT int RandInt(int min, int max);
+
+// Returns a random number in range [0, range).  Thread-safe.
+//
+// Note that this can be used as an adapter for std::random_shuffle():
+// Given a pre-populated |std::vector<int> myvector|, shuffle it as
+//   std::random_shuffle(myvector.begin(), myvector.end(), base::RandGenerator);
+BASE_EXPORT uint64_t RandGenerator(uint64_t range);
+
+// Returns a random double in range [0, 1). Thread-safe.
+BASE_EXPORT double RandDouble();
+
+// Given input |bits|, convert with maximum precision to a double in
+// the range [0, 1). Thread-safe.
+BASE_EXPORT double BitsToOpenEndedUnitInterval(uint64_t bits);
+
+// Fills |output_length| bytes of |output| with random data.
+//
+// WARNING:
+// Do not use for security-sensitive purposes.
+// See crypto/ for cryptographically secure random number generation APIs.
+BASE_EXPORT void RandBytes(void* output, size_t output_length);
+
+// Fills a string of length |length| with random data and returns it.
+// |length| should be nonzero.
+//
+// Note that this is a variation of |RandBytes| with a different return type.
+// The returned string is likely not ASCII/UTF-8. Use with care.
+//
+// WARNING:
+// Do not use for security-sensitive purposes.
+// See crypto/ for cryptographically secure random number generation APIs.
+BASE_EXPORT std::string RandBytesAsString(size_t length);
+
+#if defined(OS_POSIX)
+BASE_EXPORT int GetUrandomFD();
+#endif
+
+}  // namespace base
+
+#endif  // BASE_RAND_UTIL_H_