net: Use SequencedTaskRunner for URLFetcherResponseWriter

chrome/browser/google_apis/gdata_wapi_requests.cc

 // 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.
 
 #include "chrome/browser/google_apis/gdata_wapi_requests.h"
 
 #include "base/location.h"
+#include "base/sequenced_task_runner.h"
 #include "base/task_runner_util.h"
 #include "base/values.h"
 #include "chrome/browser/google_apis/gdata_wapi_parser.h"
 #include "chrome/browser/google_apis/gdata_wapi_url_generator.h"
 #include "chrome/browser/google_apis/request_sender.h"
 #include "chrome/browser/google_apis/request_util.h"
 #include "third_party/libxml/chromium/libxml_utils.h"
 
 using net::URLFetcher;
 
@@ skipping 697 matching lines @@
           get_content_callback,
           progress_callback,
           url_generator.GenerateDownloadFileUrl(resource_id),
           output_file_path) {
 }
 
 DownloadFileRequest::~DownloadFileRequest() {
 }
 
 }  // namespace google_apis