Remove DeleteTask and convert remaining users.

chrome/browser/safe_browsing/safe_browsing_service.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 Safe Browsing service is responsible for downloading anti-phishing and
 // anti-malware tables and checking urls against them.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_SERVICE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_SERVICE_H_
 #pragma once
 
 #include <deque>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/message_loop_helpers.h"
 #include "base/observer_list.h"
 #include "base/synchronization/lock.h"
-#include "base/task.h"
 #include "base/time.h"
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "googleurl/src/gurl.h"
 
 class MalwareDetails;
 class PrefChangeRegistrar;
 class PrefService;
@@ skipping 297 matching lines @@
 
   // Clients that we've queued up for checking later once the database is ready.
   struct QueuedCheck {
     Client* client;
     GURL url;
     base::TimeTicks start;  // When check was queued.
   };
 
   friend struct content::BrowserThread::DeleteOnThread<
       content::BrowserThread::UI>;
-  friend class DeleteTask<SafeBrowsingService>;
+  friend class base::DeleteHelper<SafeBrowsingService>;
   friend class SafeBrowsingServiceTest;
 
   // Called to initialize objects that are used on the io_thread.
   void OnIOInitialize(const std::string& client_key,
                       const std::string& wrapped_key,
                       net::URLRequestContextGetter* request_context_getter);
 
   // Called to shutdown operations on the io_thread.
   void OnIOShutdown();
 
@@ skipping 226 matching lines @@
 class SafeBrowsingServiceFactory {
  public:
   SafeBrowsingServiceFactory() { }
   virtual ~SafeBrowsingServiceFactory() { }
   virtual SafeBrowsingService* CreateSafeBrowsingService() = 0;
  private:
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingServiceFactory);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_SERVICE_H_