Added crypto random-number generator

crypto/random.cc

+// 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.
+
+#include "crypto/random.h"
+
+#include "base/rand_util.h"
+
+namespace crypto {
+
+void RandBytes(void *bytes, size_t length) {
+  // It's OK to call base::RandBytes(), because it's already strongly random.
+  // But _other_ code should go through this function to ensure that code which
+  // needs secure randomness is easily discoverable.
+  base::RandBytes(bytes, length);
+}
+
+}  // namespace crypto
+