Move crypto_helpers from sync to base

crypto/random_unittest.cc

+// Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
+
+TEST(CryptoHelpers, GetRandomBytes) {
+  for (int i = 1; i < 25; ++i) {
+    std::string random_bytes(i+1, ' ');

[wtc, 2011/04/28 19:42:22]

Nit: Google Style Guide recommends adding spaces around '+'.

+    do {
+      GetRandomBytes(&random_bytes[0], i);
+      ASSERT_EQ(random_bytes[i], ' ');
+    } while (random_bytes[i - 1] == ' ');
+  }
+}