Move crypto_helpers from sync to base

crypto/random_unittest.cc

Index: crypto/random_unittest.cc
diff --git a/crypto/random_unittest.cc b/crypto/random_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e173e0921620e5a7f25d48fbcaf9bee8545f44a1
--- /dev/null
+++ b/crypto/random_unittest.cc
@@ -0,0 +1,16 @@
+// 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, ' ');
+    do {
+      GetRandomBytes(&random_bytes[0], i);
+      ASSERT_EQ(random_bytes[i], ' ');
+    } while (random_bytes[i - 1] == ' ');
+  }
+}