Remove DeleteTask and convert remaining users.

chrome/browser/safe_browsing/malware_details_history.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_SAFE_BROWSING_MALWARE_DETAILS_HISTORY_H_
 #define CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_HISTORY_H_
 #pragma once
 
 // This class gets redirect chain for urls from the history service.
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/hash_tables.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
+#include "base/message_loop_helpers.h"
 #include "chrome/browser/history/history.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "net/base/completion_callback.h"
 
 namespace safe_browsing {
 typedef std::vector<GURL> RedirectChain;
 }
 
@@ skipping 14 matching lines @@
 
   // Returns whether or not StartCacheCollection has been called.
   bool HasStarted() const;
 
   // Returns the redirect urls we get from history service
   const std::vector<safe_browsing::RedirectChain>& GetCollectedUrls() const;
 
  private:
   friend struct content::BrowserThread::DeleteOnThread<
       content::BrowserThread::UI>;
-  friend class DeleteTask<MalwareDetailsRedirectsCollector>;
+  friend class base::DeleteHelper<MalwareDetailsRedirectsCollector>;
 
   Profile* profile_;
   CancelableRequestConsumer request_consumer_;
 
   // Method we call when we are done. The caller must be alive for the
   // whole time, we are modifying its state (see above).
   base::Closure callback_;
 
   // Sets to true once StartHistoryCollection is called
   bool has_started_;
@@ skipping 19 matching lines @@
   void AllDone();
 
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(MalwareDetailsRedirectsCollector);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_HISTORY_H_