Move Rename functionality from DownloadFileManager to DownloadFileImple.

content/public/browser/download_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 DownloadManager object manages the process of downloading, including
 // updates to the history system and providing the information for displaying
 // the downloads view in the Destinations tab. There is one DownloadManager per
 // active browser context in Chrome.
 //
 // Download observers:
@@ skipping 135 matching lines @@
   virtual void CancelDownload(int32 download_id) = 0;
 
   // Called when there is an error in the download.
   // |download_id| is the ID of the download.
   // |size| is the number of bytes that are currently downloaded.
   // |hash_state| is the current state of the hash of the data that has been
   // downloaded.
   // |reason| is a download interrupt reason code.
   virtual void OnDownloadInterrupted(
       int32 download_id,
-      int64 size,
-      const std::string& hash_state,
       DownloadInterruptReason reason) = 0;
 
   // Remove downloads after remove_begin (inclusive) and before remove_end
   // (exclusive). You may pass in null Time values to do an unbounded delete
   // in either direction.
   virtual int RemoveDownloadsBetween(base::Time remove_begin,
                                      base::Time remove_end) = 0;
 
   // Remove downloads will delete all downloads that have a timestamp that is
   // the same or more recent than |remove_begin|. The number of downloads
@@ skipping 80 matching lines @@
  protected:
   virtual ~DownloadManager() {}
 
  private:
   friend class base::RefCountedThreadSafe<DownloadManager>;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_H_