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diff --git a/ipc/chromium/src/base/rand_util.h b/ipc/chromium/src/base/rand_util.h
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+++ b/ipc/chromium/src/base/rand_util.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 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 "base/basictypes.h"
+
+namespace base {
+
+// Returns a random number in range [0, kuint64max]. Thread-safe.
+uint64_t RandUint64();
+
+// Returns a random number between min and max (inclusive). Thread-safe.
+int RandInt(int min, int max);
+
+// Returns a random double in range [0, 1). Thread-safe.
+double RandDouble();
+
+// 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.
+void RandBytes(void* output, size_t output_length);
+
+}  // namespace base
+
+#endif // BASE_RAND_UTIL_H_