Move the core download files to content.

chrome/browser/download/download_file.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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_
-#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_
-#pragma once
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "chrome/browser/download/download_request_handle.h"
-#include "chrome/browser/download/download_types.h"
-#include "content/browser/download/base_file.h"
-
-struct DownloadCreateInfo;
-class DownloadManager;
-class ResourceDispatcherHost;
-
-// These objects live exclusively on the download thread and handle the writing
-// operations for one download. These objects live only for the duration that
-// the download is 'in progress': once the download has been completed or
-// cancelled, the DownloadFile is destroyed.
-class DownloadFile : public BaseFile {
- public:
-  DownloadFile(const DownloadCreateInfo* info,
-               DownloadManager* download_manager);
-  virtual ~DownloadFile();
-
-  // Cancels the download request associated with this file.
-  void CancelDownloadRequest();
-
-  int id() const { return id_; }
-  DownloadManager* GetDownloadManager();
-
-  virtual std::string DebugString() const;
-
- private:
-  // The unique identifier for this download, assigned at creation by
-  // the DownloadFileManager for its internal record keeping.
-  int id_;
-
-  // The handle to the request information.  Used for operations outside the
-  // download system, specifically canceling a download.
-  DownloadRequestHandle request_handle_;
-
-  // DownloadManager this download belongs to.
-  scoped_refptr<DownloadManager> download_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadFile);
-};
-
-#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H_