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

crypto/secure_hash.cc

 // Copyright (c) 2012 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/secure_hash.h"
 
 #include <openssl/mem.h>
 #include <openssl/sha.h>
 #include <stddef.h>
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/pickle.h"
 #include "crypto/openssl_util.h"
 
 namespace crypto {
 
 namespace {
 
 class SecureHashSHA256 : public SecureHash {
  public:
   SecureHashSHA256() {
@@ skipping 11 matching lines @@
   void Update(const void* input, size_t len) override {
     SHA256_Update(&ctx_, static_cast<const unsigned char*>(input), len);
   }
 
   void Finish(void* output, size_t len) override {
     ScopedOpenSSLSafeSizeBuffer<SHA256_DIGEST_LENGTH> result(
         static_cast<unsigned char*>(output), len);
     SHA256_Final(result.safe_buffer(), &ctx_);
   }
 
-  SecureHash* Clone() const override {
-    return new SecureHashSHA256(*this);
+  std::unique_ptr<SecureHash> Clone() const override {
+    return base::MakeUnique<SecureHashSHA256>(*this);
   }
 
   size_t GetHashLength() const override { return SHA256_DIGEST_LENGTH; }
 
  private:
   SHA256_CTX ctx_;
 };
 
 }  // namespace
 
-SecureHash* SecureHash::Create(Algorithm algorithm) {
+std::unique_ptr<SecureHash> SecureHash::Create(Algorithm algorithm) {
   switch (algorithm) {
     case SHA256:
-      return new SecureHashSHA256();
+      return base::MakeUnique<SecureHashSHA256>();
     default:
       NOTIMPLEMENTED();
-      return NULL;
+      return nullptr;
   }
 }
 
 }  // namespace crypto