[Downloads] Rework how hashes are calculated for download files.

content/browser/download/download_net_log_parameters.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_NET_LOG_PARAMETERS_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_NET_LOG_PARAMETERS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 32 matching lines @@
 // Returns NetLog parameters when a DownloadItem is renamed.
 scoped_ptr<base::Value> ItemRenamedNetLogCallback(
     const base::FilePath* old_filename,
     const base::FilePath* new_filename,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadItem is interrupted.
 scoped_ptr<base::Value> ItemInterruptedNetLogCallback(
     DownloadInterruptReason reason,
     int64_t bytes_so_far,
-    const std::string* hash_state,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadItem is resumed.
 scoped_ptr<base::Value> ItemResumingNetLogCallback(
     bool user_initiated,
     DownloadInterruptReason reason,
     int64_t bytes_so_far,
-    const std::string* hash_state,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadItem is completing.
 scoped_ptr<base::Value> ItemCompletingNetLogCallback(
     int64_t bytes_so_far,
     const std::string* final_hash,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadItem is finished.
 scoped_ptr<base::Value> ItemFinishedNetLogCallback(
     bool auto_opened,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadItem is canceled.
 scoped_ptr<base::Value> ItemCanceledNetLogCallback(
     int64_t bytes_so_far,
-    const std::string* hash_state,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadFile is opened.
 scoped_ptr<base::Value> FileOpenedNetLogCallback(
     const base::FilePath* file_name,
     int64_t start_offset,
     net::NetLogCaptureMode capture_mode);
 
 // Returns NetLog parameters when a DownloadFile is opened.
 scoped_ptr<base::Value> FileStreamDrainedNetLogCallback(
@@ skipping 16 matching lines @@
 // Returns NetLog parameters for a download interruption.
 scoped_ptr<base::Value> FileInterruptedNetLogCallback(
     const char* operation,
     int os_error,
     DownloadInterruptReason reason,
     net::NetLogCaptureMode capture_mode);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_NET_LOG_PARAMETERS_H_