Change URLRequest to use a ref-counted buffer for actual IO....

chrome/browser/download/save_file_manager.h

 // Copyright (c) 2006-2008 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.
 //
 // Objects that handle file operations for saving files, on the file thread.
 //
 // The SaveFileManager owns a set of SaveFile objects, each of which connects
 // with a SaveItem object which belongs to one SavePackage and runs on the file
 // thread for saving data in order to avoid disk activity on either network IO
 // thread or the UI thread. It coordinates the notifications from the network
@@ skipping 48 matching lines @@
 #define CHROME_BROWSER_DOWNLOAD_SAVE_FILE_MANAGER_H__
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/ref_counted.h"
 #include "base/thread.h"
 #include "chrome/browser/download/save_types.h"
 
+namespace net {
+class IOBuffer;
+}
 class GURL;
 class SaveFile;
 class SavePackage;
 class MessageLoop;
 class ResourceDispatcherHost;
 class Task;
 class URLRequestContext;
 
 class SaveFileManager
     : public base::RefCountedThreadSafe<SaveFileManager> {
@@ skipping 15 matching lines @@
                const std::wstring& referrer,
                int render_process_host_id,
                int render_view_id,
                SaveFileCreateInfo::SaveFileSource save_source,
                const std::wstring& file_full_path,
                URLRequestContext* request_context,
                SavePackage* save_package);
 
   // Notifications sent from the IO thread and run on the file thread:
   void StartSave(SaveFileCreateInfo* info);
-  void UpdateSaveProgress(int save_id, char* data, int size);
+  void UpdateSaveProgress(int save_id, net::IOBuffer* data, int size);
   void SaveFinished(int save_id, std::wstring save_url,
                     int render_process_id, bool is_success);
 
   // Notifications sent from the UI thread and run on the file thread.
   // Cancel a SaveFile instance which has specified save id.
   void CancelSave(int save_id);
 
   // Called on the UI thread to remove a save package from SaveFileManager's
   // tracking map.
   void RemoveSaveFile(int save_id, const std::wstring& save_url,
@@ skipping 138 matching lines @@
   // hashmap since it is possible to save same URL in different tab at
   // same time.
   typedef base::hash_map<std::wstring, SavePackage*> StartingRequestsMap;
   typedef base::hash_map<int, StartingRequestsMap> TabToStartingRequestsMap;
   TabToStartingRequestsMap tab_starting_requests_;
 
   DISALLOW_EVIL_CONSTRUCTORS(SaveFileManager);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_SAVE_FILE_MANAGER_H__