Allow custom deleters to opt out of self reset checks for scoped_ptr.

crypto/scoped_openssl_types.h

 // Copyright 2014 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_SCOPED_OPENSSL_TYPES_H_
 #define CRYPTO_SCOPED_OPENSSL_TYPES_H_
 
 #include <openssl/bio.h>
 #include <openssl/bn.h>
 #include <openssl/dsa.h>
 #include <openssl/ec.h>
 #include <openssl/ecdsa.h>
 #include <openssl/evp.h>
 #include <openssl/rsa.h>
 
 #include "base/memory/scoped_ptr.h"
 
 namespace crypto {
 
 // Simplistic helper that wraps a call to a deleter function. In a C++11 world,
 // this would be std::function<>. An alternative would be to re-use
 // base::internal::RunnableAdapter<>, but that's far too heavy weight.
 template <typename Type, void (*Destroyer)(Type*)>
 struct OpenSSLDestroyer {
+  typedef void AllowSelfReset;
   void operator()(Type* ptr) const { Destroyer(ptr); }
 };
 
 template <typename PointerType, void (*Destroyer)(PointerType*)>
 struct ScopedOpenSSL {
   typedef scoped_ptr<PointerType, OpenSSLDestroyer<PointerType, Destroyer> >
       Type;
 };
 
 struct OpenSSLFree {
@@ skipping 14 matching lines @@
 typedef ScopedOpenSSL<EVP_PKEY, EVP_PKEY_free>::Type ScopedEVP_PKEY;
 typedef ScopedOpenSSL<EVP_PKEY_CTX, EVP_PKEY_CTX_free>::Type ScopedEVP_PKEY_CTX;
 typedef ScopedOpenSSL<RSA, RSA_free>::Type ScopedRSA;
 
 // The bytes must have been allocated with OPENSSL_malloc.
 typedef scoped_ptr<uint8_t, OpenSSLFree> ScopedOpenSSLBytes;
 
 }  // namespace crypto
 
 #endif  // CRYPTO_SCOPED_OPENSSL_TYPES_H_