Create base::WorkerPoolJob. Use it for HostResolverImpl and DirectoryLister.

net/url_request/url_request_file_dir_job.h

 // Copyright (c) 2010 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 NET_URL_REQUEST_URL_REQUEST_FILE_DIR_JOB_H__
 #define NET_URL_REQUEST_URL_REQUEST_FILE_DIR_JOB_H__
 #pragma once
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/task.h"
 #include "net/base/directory_lister.h"
 #include "net/url_request/url_request_job.h"
 
 class URLRequestFileDirJob
-  : public net::URLRequestJob,
-    public net::DirectoryLister::DirectoryListerDelegate {
+    : public net::URLRequestJob, public net::DirectoryLister::Delegate {
  public:
   URLRequestFileDirJob(net::URLRequest* request, const FilePath& dir_path);
 
   // net::URLRequestJob methods:
   virtual void Start();
   virtual void StartAsync();
   virtual void Kill();
   virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int *bytes_read);
   virtual bool GetMimeType(std::string* mime_type) const;
   virtual bool GetCharset(std::string* charset);
 
-  // DirectoryLister::DirectoryListerDelegate methods:
+  // DirectoryLister::Delegate methods:
   virtual void OnListFile(
-      const net::DirectoryLister::DirectoryListerData& data);
+      const net::DirectoryLister::Data& data);
   virtual void OnListDone(int error);
 
   bool list_complete() const { return list_complete_; }
 
  private:
   virtual ~URLRequestFileDirJob();
 
   void CloseLister();
   // When we have data and a read has been pending, this function
   // will fill the response buffer and notify the request
   // appropriately.
   void CompleteRead();
 
   // Fills a buffer with the output.
   bool FillReadBuffer(char *buf, int buf_size, int *bytes_read);
 
-  scoped_refptr<net::DirectoryLister> lister_;
+  net::DirectoryLister lister_;
   FilePath dir_path_;
   std::string data_;
   bool canceled_;
 
   // Indicates whether we have the complete list of the dir
   bool list_complete_;
 
   // Indicates whether we have written the HTML header
   bool wrote_header_;
 
   // To simulate Async IO, we hold onto the Reader's buffer while
   // we wait for IO to complete.  When done, we fill the buffer
   // manually.
   bool read_pending_;
   scoped_refptr<net::IOBuffer> read_buffer_;
   int read_buffer_length_;
   ScopedRunnableMethodFactory<URLRequestFileDirJob> method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestFileDirJob);
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_FILE_DIR_JOB_H__