Adjust URLFetcher::Create API so that object is returned as scoped_ptr.

components/update_client/url_fetcher_downloader.cc

 // Copyright 2014 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 "components/update_client/url_fetcher_downloader.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 15 matching lines @@
       total_bytes_(-1) {
 }
 
 UrlFetcherDownloader::~UrlFetcherDownloader() {
   DCHECK(thread_checker_.CalledOnValidThread());
 }
 
 void UrlFetcherDownloader::DoStartDownload(const GURL& url) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
-  url_fetcher_.reset(
-      net::URLFetcher::Create(0, url, net::URLFetcher::GET, this));
+  url_fetcher_ = net::URLFetcher::Create(0, url, net::URLFetcher::GET, this);
   url_fetcher_->SetRequestContext(context_getter_);
   url_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                              net::LOAD_DO_NOT_SAVE_COOKIES |
                              net::LOAD_DISABLE_CACHE);
   url_fetcher_->SetAutomaticallyRetryOn5xx(false);
   url_fetcher_->SaveResponseToTemporaryFile(task_runner_);
 
   VLOG(1) << "Starting background download: " << url.spec();
   url_fetcher_->Start();
 
@@ skipping 52 matching lines @@
   total_bytes_ = total;
 
   Result result;
   result.downloaded_bytes = downloaded_bytes_;
   result.total_bytes = total_bytes_;
 
   OnDownloadProgress(result);
 }
 
 }  // namespace update_client