Added member data to classes to support download resumption.

content/browser/download/download_file_manager.h

 // 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.
 //
 // The DownloadFileManager owns a set of DownloadFile objects, each of which
 // represent one in progress download and performs the disk IO for that
 // download. The DownloadFileManager itself is a singleton object owned by the
 // ResourceDispatcherHost.
 //
 // The DownloadFileManager uses the file_thread for performing file write
@@ skipping 59 matching lines @@
 class CONTENT_EXPORT DownloadFileManager
     : public base::RefCountedThreadSafe<DownloadFileManager> {
  public:
   class DownloadFileFactory {
    public:
     virtual ~DownloadFileFactory() {}
 
     virtual content::DownloadFile* CreateFile(
         DownloadCreateInfo* info,
         const DownloadRequestHandle& request_handle,
-        content::DownloadManager* download_manager) = 0;
+        content::DownloadManager* download_manager,
+        bool calculate_hash) = 0;
   };
 
   // Takes ownership of the factory.
   // Passing in a NULL for |factory| will cause a default
   // |DownloadFileFactory| to be used.
   DownloadFileManager(ResourceDispatcherHost* rdh,
                       DownloadFileFactory* factory);
 
   // Called on shutdown on the UI thread.
   void Shutdown();
@@ skipping 88 matching lines @@
   // is controlled from the FILE thread, and posts updates to the UI thread.
   base::RepeatingTimer<DownloadFileManager> update_timer_;
 
   ResourceDispatcherHost* resource_dispatcher_host_;
   scoped_ptr<DownloadFileFactory> download_file_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileManager);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_