Remove DeleteTask and convert remaining users.

chrome/browser/ui/webui/chrome_url_data_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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_CHROME_URL_DATA_MANAGER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROME_URL_DATA_MANAGER_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
+#include "base/message_loop_helpers.h"
 #include "base/synchronization/lock.h"
-#include "base/task.h"
 
 class ChromeURLDataManagerBackend;
 class MessageLoop;
 class RefCountedMemory;
 
 namespace base {
 class DictionaryValue;
 }
 
 // To serve dynamic data off of chrome: URLs, implement the
@@ skipping 81 matching lines @@
 
     static void SetFontAndTextDirection(
         base::DictionaryValue* localized_strings);
 
    protected:
     virtual ~DataSource();
 
    private:
     friend class ChromeURLDataManagerBackend;
     friend class ChromeURLDataManager;
-    friend class DeleteTask<DataSource>;
+    friend class base::DeleteHelper<DataSource>;
 
     // SendResponse invokes this on the IO thread. Notifies the backend to
     // handle the actual work of sending the data.
     virtual void SendResponseOnIOThread(int request_id,
                                         scoped_refptr<RefCountedMemory> bytes);
 
     // The name of this source.
     // E.g., for favicons, this could be "favicon", which results in paths for
     // specific resources like "favicon/34" getting sent to this source.
     const std::string source_name_;
@@ skipping 50 matching lines @@
   const base::Callback<ChromeURLDataManagerBackend*(void)> backend_;
 
   // |data_sources_| that are no longer referenced and scheduled for deletion.
   // Protected by g_delete_lock in the .cc file.
   static DataSources* data_sources_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeURLDataManager);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROME_URL_DATA_MANAGER_H_