TabContents -> WebContentsImpl, part 9.

content/browser/download/download_file_manager.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.
 //
 // 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
 // ResourceDispatcherHostImpl.
 //
 // The DownloadFileManager uses the file_thread for performing file write
@@ skipping 13 matching lines @@
 // Cancel operations perform the inverse order when triggered by a user action:
 // ui_thread (user click)
 //    |----> cancel command ---->|
 //                          file_thread (close file)
 //                                 |----> cancel command ---->|
 //                                                    io_thread (stops net IO
 //                                                               for download)
 //
 // The DownloadFileManager tracks download requests, mapping from a download
 // ID (unique integer created in the IO thread) to the DownloadManager for the
-// tab (profile) where the download was initiated. In the event of a tab closure
-// during a download, the DownloadFileManager will continue to route data to the
-// appropriate DownloadManager. In progress downloads are cancelled for a
-// DownloadManager that exits (such as when closing a profile).
+// contents (profile) where the download was initiated. In the event of a
+// contents closure during a download, the DownloadFileManager will continue to
+// route data to the appropriate DownloadManager. In progress downloads are
+// cancelled for a DownloadManager that exits (such as when closing a profile).
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_
 #pragma once
 
 #include <map>
 
 #include "base/atomic_sequence_num.h"
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
@@ skipping 148 matching lines @@
   // Schedule periodic updates of the download progress. This timer
   // is controlled from the FILE thread, and posts updates to the UI thread.
   scoped_ptr<base::RepeatingTimer<DownloadFileManager> > update_timer_;
 
   scoped_ptr<DownloadFileFactory> download_file_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileManager);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_