Make //crypto factories return std::unique_ptr<>s

crypto/signature_verifier.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/signature_verifier.h"
 
 #include <openssl/bytestring.h>
 #include <openssl/digest.h>
 #include <openssl/evp.h>
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/logging.h"
 #include "crypto/openssl_util.h"
 #include "crypto/scoped_openssl_types.h"
 
 namespace crypto {
 
 namespace {
 
 const EVP_MD* ToOpenSSLDigest(SignatureVerifier::HashAlgorithm hash_alg) {
   switch (hash_alg) {
     case SignatureVerifier::SHA1:
       return EVP_sha1();
     case SignatureVerifier::SHA256:
       return EVP_sha256();
   }
-  return NULL;
+  return nullptr;
 }
 
 }  // namespace
 
 struct SignatureVerifier::VerifyContext {
   ScopedEVP_MD_CTX ctx;
 };
 
-SignatureVerifier::SignatureVerifier()
-    : verify_context_(NULL) {
-}
+SignatureVerifier::SignatureVerifier() : verify_context_(nullptr) {}
 
 SignatureVerifier::~SignatureVerifier() {
   Reset();
 }
 
 bool SignatureVerifier::VerifyInit(SignatureAlgorithm signature_algorithm,
                                    const uint8_t* signature,
                                    int signature_len,
                                    const uint8_t* public_key_info,
                                    int public_key_info_len) {
@@ skipping 94 matching lines @@
   }
 
   verify_context_->ctx.reset(EVP_MD_CTX_create());
   int rv = EVP_DigestVerifyInit(verify_context_->ctx.get(), pkey_ctx,
                                 digest, nullptr, public_key.get());
   return rv == 1;
 }
 
 void SignatureVerifier::Reset() {
   delete verify_context_;
-  verify_context_ = NULL;
+  verify_context_ = nullptr;
   signature_.clear();
 }
 
 }  // namespace crypto