Remove DeleteTask and convert remaining users.

content/browser/download/download_manager_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_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 #pragma once
 
 #include "content/public/browser/download_manager.h"
 
 #include <map>
 #include <set>
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/message_loop_helpers.h"
 #include "base/observer_list.h"
 #include "base/synchronization/lock.h"
 #include "content/browser/download/download_item_impl.h"
 #include "content/browser/download/download_status_updater_delegate.h"
 #include "content/common/content_export.h"
 
 class DownloadIdFactory;
 class DownloadStatusUpdater;
 
 class CONTENT_EXPORT DownloadManagerImpl
@@ skipping 102 matching lines @@
   typedef base::hash_map<int64, content::DownloadItem*> DownloadMap;
 
   // For testing.
   friend class DownloadManagerTest;
   friend class DownloadTest;
 
   friend class base::RefCountedThreadSafe<
       DownloadManagerImpl, content::BrowserThread::DeleteOnUIThread>;
   friend struct content::BrowserThread::DeleteOnThread<
       content::BrowserThread::UI>;
-  friend class DeleteTask<DownloadManagerImpl>;
+  friend class base::DeleteHelper<DownloadManagerImpl>;
 
   virtual ~DownloadManagerImpl();
 
   // Determine if the download is ready for completion, i.e. has had
   // all data saved, and completed the filename determination and
   // history insertion.
   bool IsDownloadReadyForCompletion(content::DownloadItem* download);
 
   // Show the download in the browser.
   void ShowDownloadInBrowser(content::DownloadItem* download);
@@ skipping 118 matching lines @@
   DownloadIdFactory* id_factory_;
 
   // TODO(rdsmith): Remove when http://crbug.com/85408 is fixed.
   // For debugging only.
   int64 largest_db_handle_in_history_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerImpl);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_