Switch remaining scoped_openssl_types uses to BoringSSL scopers.

crypto/auto_cbb.h

-// Copyright 2016 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_AUTO_CBB_H_
-#define CRYPTO_AUTO_CBB_H_
-
-#include <openssl/bytestring.h>
-
-#include "base/macros.h"
-
-namespace crypto {
-
-// AutoCBB is a wrapper over OpenSSL's CBB type that automatically releases
-// resources when going out of scope.
-class AutoCBB {
- public:
-  AutoCBB() { CBB_zero(&cbb_); }
-  ~AutoCBB() { CBB_cleanup(&cbb_); }
-
-  CBB* get() { return &cbb_; }
-
-  void Reset() {
-    CBB_cleanup(&cbb_);
-    CBB_zero(&cbb_);
-  }
-
- private:
-  CBB cbb_;
-  DISALLOW_COPY_AND_ASSIGN(AutoCBB);
-};
-
-}  // namespace crypto
-
-#endif   // CRYPTO_AUTO_CBB_H_