Remove DeleteTask and convert remaining users.

chrome/browser/ui/webui/quota_internals_proxy.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_QUOTA_INTERNALS_PROXY_H_
 #define CHROME_BROWSER_UI_WEBUI_QUOTA_INTERNALS_PROXY_H_
 #pragma once
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/message_loop_helpers.h"
 #include "content/public/browser/browser_thread.h"
 #include "webkit/quota/quota_manager.h"
 #include "webkit/quota/quota_types.h"
 
 namespace quota_internals {
 
 class QuotaInternalsHandler;
 class GlobalStorageInfo;
 class PerHostStorageInfo;
 class PerOriginStorageInfo;
@@ skipping 47 matching lines @@
   // Used on IO Thread.
   base::WeakPtrFactory<QuotaInternalsProxy> weak_factory_;
   scoped_refptr<quota::QuotaManager> quota_manager_;
   std::set<std::pair<std::string, quota::StorageType> >
       hosts_visited_, hosts_pending_;
   std::vector<PerHostStorageInfo> report_pending_;
 
   friend class QuotaInternalsHandler;
   friend struct content::BrowserThread::DeleteOnThread<
       content::BrowserThread::IO>;
-  friend class DeleteTask<QuotaInternalsProxy>;
+  friend class base::DeleteHelper<QuotaInternalsProxy>;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaInternalsProxy);
 };
 }  // quota_internals
 
 #endif  // CHROME_BROWSER_UI_WEBUI_QUOTA_INTERNALS_PROXY_H_