Change URLRequest to use a ref-counted buffer for actual IO....

chrome/browser/automation/url_request_slow_download_job.h

 // Copyright (c) 2006-2008 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.
 // This class simulates a slow download.  This used in a UI test to test the
 // download manager.  Requests to |kUnknownSizeUrl| and |kKnownSizeUrl| start
 // downloads that pause after the first
 
 #ifndef CHROME_BROWSER_AUTOMATION_URL_REQUEST_SLOW_DOWNLOAD_JOB_H__
 #define CHROME_BROWSER_AUTOMATION_URL_REQUEST_SLOW_DOWNLOAD_JOB_H__
 
 #include <vector>
 
 #include "net/url_request/url_request_job.h"
 
 class URLRequestSlowDownloadJob : public URLRequestJob {
  public:
   URLRequestSlowDownloadJob(URLRequest* request);
   virtual ~URLRequestSlowDownloadJob() { }
 
   // Timer callback, used to check to see if we should finish our download and
   // send the second chunk.
   void CheckDoneStatus();
 
   // URLRequestJob methods
   virtual void Start();
   virtual bool GetMimeType(std::string* mime_type);
   virtual void GetResponseInfo(net::HttpResponseInfo* info);
-  virtual bool ReadRawData(char* buf, int buf_size, int *bytes_read);
+  virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int *bytes_read);
 
   static URLRequestJob* Factory(URLRequest* request,
                                 const std::string& scheme);
 
   // Test URLs.
   static const wchar_t kUnknownSizeUrl[];
   static const wchar_t kKnownSizeUrl[];
   static const wchar_t kFinishDownloadUrl[];
 
   // For UI tests: adds the testing URLs to the URLRequestFilter.
   static void AddUITestUrls();
 
  private:
   // Mark all pending requests to be finished.  We keep track of pending
   // requests in |kPendingRequests|.
   static void FinishPendingRequests();
   static std::vector<URLRequestSlowDownloadJob*> kPendingRequests;
 
   void StartAsync();
 
   void set_should_finish_download() { should_finish_download_ = true; }
 
   int first_download_size_remaining_;
   bool should_finish_download_;
   bool should_send_second_chunk_;
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_URL_REQUEST_SLOW_DOWNLOAD_JOB_H__