Added member data to classes to support download resumption.

content/browser/download/download_file_impl.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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_
 #pragma once
 
 #include "content/browser/download/download_file.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/browser/download/download_request_handle.h"
 #include "content/common/content_export.h"
 
 struct DownloadCreateInfo;
 class DownloadManager;
 
 class CONTENT_EXPORT DownloadFileImpl : virtual public DownloadFile {
  public:
   // Takes ownership of the object pointed to by |request_handle|.
   DownloadFileImpl(const DownloadCreateInfo* info,
                    DownloadRequestHandleInterface* request_handle,
-                   DownloadManager* download_manager);
+                   DownloadManager* download_manager,
+                   bool calculate_hash);
   virtual ~DownloadFileImpl();
 
   // DownloadFile functions.
-  virtual net::Error Initialize(bool calculate_hash) OVERRIDE;
+  virtual net::Error Initialize() OVERRIDE;
   virtual net::Error AppendDataToFile(const char* data,
                                       size_t data_len) OVERRIDE;
   virtual net::Error Rename(const FilePath& full_path) OVERRIDE;
   virtual void Detach() OVERRIDE;
   virtual void Cancel() OVERRIDE;
   virtual void Finish() OVERRIDE;
   virtual void AnnotateWithSourceInformation() OVERRIDE;
   virtual FilePath FullPath() const OVERRIDE;
   virtual bool InProgress() const OVERRIDE;
   virtual int64 BytesSoFar() const OVERRIDE;
   virtual int64 CurrentSpeed() const OVERRIDE;
-  virtual bool GetSha256Hash(std::string* hash) OVERRIDE;
+  virtual bool GetHash(std::string* hash) OVERRIDE;
+  virtual std::string GetHashState() OVERRIDE;
   virtual void CancelDownloadRequest() OVERRIDE;
   virtual int Id() const OVERRIDE;
   virtual DownloadManager* GetDownloadManager() OVERRIDE;
   virtual const DownloadId& GlobalId() const OVERRIDE;
   virtual std::string DebugString() const OVERRIDE;
 
  private:
   // The base file instance.
   BaseFile file_;
 
   // The unique identifier for this download, assigned at creation by
   // the DownloadFileManager for its internal record keeping.
   DownloadId id_;
 
   // The handle to the request information.  Used for operations outside the
   // download system, specifically canceling a download.
   scoped_ptr<DownloadRequestHandleInterface> request_handle_;
 
   // DownloadManager this download belongs to.
   scoped_refptr<DownloadManager> download_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileImpl);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_