net: Use SequencedTaskRunner for URLFetcherResponseWriter

chrome/browser/google_apis/base_requests.h

 // Copyright (c) 2012 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 file provides base classes used to issue HTTP requests for Google
 // APIs.
 
 #ifndef CHROME_BROWSER_GOOGLE_APIS_BASE_REQUESTS_H_
 #define CHROME_BROWSER_GOOGLE_APIS_BASE_REQUESTS_H_
 
@@ skipping 76 matching lines @@
   virtual void Cancel() = 0;
 };
 
 //=========================== ResponseWriter ==================================
 
 // Saves the response for the request to a file or string.
 class ResponseWriter : public net::URLFetcherResponseWriter {
  public:
   // If file_path is not empty, the response will be saved with file_writer_,
   // otherwise it will be saved to data_.
-  ResponseWriter(base::TaskRunner* file_task_runner,
+  ResponseWriter(base::SequencedTaskRunner* file_task_runner,
                  const base::FilePath& file_path,
                  const GetContentCallback& get_content_callback);
   virtual ~ResponseWriter();
 
   const std::string& data() const { return data_; }
 
   // Disowns the output file.
   void DisownFile();
 
   // URLFetcherResponseWriter overrides:
@@ skipping 78 matching lines @@
   // the status of the URLFetcher.
   static GDataErrorCode GetErrorCode(const net::URLFetcher* source);
 
   // Returns true if called on the thread where the constructor was called.
   bool CalledOnValidThread();
 
   // Returns the writer which is used to save the response for the request.
   ResponseWriter* response_writer() const { return response_writer_; }
 
   // Returns the task runner that should be used for blocking tasks.
-  base::TaskRunner* blocking_task_runner() const;
+  base::SequencedTaskRunner* blocking_task_runner() const;
 
  private:
   // URLFetcherDelegate overrides.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
 
   // AuthenticatedRequestInterface overrides.
   virtual void OnAuthFailed(GDataErrorCode code) OVERRIDE;
 
   ReAuthenticateCallback re_authenticate_callback_;
   int re_authenticate_count_;
@@ skipping 317 matching lines @@
   const ProgressCallback progress_callback_;
   const GURL download_url_;
   const base::FilePath output_file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileRequestBase);
 };
 
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_BASE_REQUESTS_H_