Make the SavePackage use of the fake download item cleaner around cancellation.

content/browser/download/download_item_impl.cc

 // 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.
 
 // File method ordering: Methods in this file are in the same order
 // as in download_item_impl.h, with the following exception: The public
 // interfaces DelayedDownloadOpened, OnDownloadTargetDetermined, and
 // OnDownloadCompleting are placed in chronological order with the other
 // (private) routines that together define a DownloadItem's state transitions
 // as the download progresses.  See "Download progression cascade" later in
@@ skipping 927 matching lines @@
 void DownloadItemImpl::MarkAsComplete() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   DCHECK(all_data_saved_);
   end_time_ = base::Time::Now();
   TransitionTo(COMPLETE);
 }
 
 void DownloadItemImpl::SetIsPersisted() {
   is_persisted_ = true;
+  UpdateObservers();
 }
 
 void DownloadItemImpl::SetDbHandle(int64 handle) {
   db_handle_ = handle;
 
   bound_net_log_.AddEvent(
       net::NetLog::TYPE_DOWNLOAD_ITEM_IN_HISTORY,
       net::NetLog::Int64Callback("db_handle", db_handle_));
 }
 
@@ skipping 288 matching lines @@
 
   bound_net_log_.AddEvent(
       net::NetLog::TYPE_DOWNLOAD_ITEM_RENAMED,
       base::Bind(&download_net_logs::ItemRenamedCallback,
                  &current_path_, &new_path));
 }