Remove DeleteTask and convert remaining users.

content/public/browser/download_manager.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.
 //
 // 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 16 matching lines @@
 #ifndef CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/gtest_prod_util.h"
+#include "base/message_loop_helpers.h"
 #include "base/time.h"
 #include "content/browser/download/download_id.h"
 #include "content/browser/download/interrupt_reasons.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/net_errors.h"
 
 class DownloadFileManager;
 class DownloadManagerTest;
 class DownloadRequestHandle;
@@ skipping 209 matching lines @@
   virtual void SetFileManager(DownloadFileManager* file_manager) = 0;
 
  private:
   // For testing.
   friend class ::DownloadManagerTest;
 
   friend class base::RefCountedThreadSafe<
       DownloadManager, content::BrowserThread::DeleteOnUIThread>;
   friend struct content::BrowserThread::DeleteOnThread<
       content::BrowserThread::UI>;
-  friend class DeleteTask<DownloadManager>;
+  friend class base::DeleteHelper<DownloadManager>;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_H_