Added crypto random-number generator

crypto/random.h

Index: crypto/random.h
diff --git a/crypto/random.h b/crypto/random.h
new file mode 100644
index 0000000000000000000000000000000000000000..9c1ff6905d44018ee6f3dede43c080d956a9486c
--- /dev/null
+++ b/crypto/random.h
@@ -0,0 +1,21 @@
+// 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 CRYPTO_RANDOM_H_
+#define CRYPTO_RANDOM_H_
+
+#include <stdlib.h>
+
+#include "crypto/crypto_export.h"
+
+namespace crypto {
+
+// Fills the given buffer with |length| random bytes of cryptographically
+// secure random numbers.
+// |length| must be positive.
+CRYPTO_EXPORT void RandBytes(void *bytes, size_t length);
+
+}
+
+#endif