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

content/browser/download/base_file.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 "content/browser/download/base_file.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file.h"
@@ skipping 190 matching lines @@
       " full_path_ = \"%" PRFilePath
       "\""
       " bytes_so_far_ = %" PRId64 " detached_ = %c }",
       full_path_.value().c_str(),
       bytes_so_far_,
       detached_ ? 'T' : 'F');
 }
 
 DownloadInterruptReason BaseFile::CalculatePartialHash(
     const std::string& hash_to_expect) {
-  secure_hash_.reset(crypto::SecureHash::Create(crypto::SecureHash::SHA256));
+  secure_hash_ = crypto::SecureHash::Create(crypto::SecureHash::SHA256);
 
   if (bytes_so_far_ == 0)
     return DOWNLOAD_INTERRUPT_REASON_NONE;
 
   if (file_.Seek(base::File::FROM_BEGIN, 0) != 0)
     return LogSystemError("Seek partial file",
                           logging::GetLastSystemErrorCode());
 
   const size_t kMinBufferSize = secure_hash_->GetHashLength();
   const size_t kMaxBufferSize = 1024 * 512;
@@ skipping 150 matching lines @@
   DVLOG(1) << __FUNCTION__ << "() operation:" << operation
            << " os_error:" << os_error
            << " reason:" << DownloadInterruptReasonToString(reason);
   bound_net_log_.AddEvent(
       net::NetLog::TYPE_DOWNLOAD_FILE_ERROR,
       base::Bind(&FileInterruptedNetLogCallback, operation, os_error, reason));
   return reason;
 }
 
 }  // namespace content