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

chrome/browser/supervised_user/legacy/supervised_user_refresh_token_fetcher.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 "chrome/browser/supervised_user/legacy/supervised_user_refresh_token_fetcher.h"
 
 #include "base/callback.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
@@ skipping 138 matching lines @@
     const std::string& access_token,
     const Time& expiration_time) {
   DCHECK_EQ(access_token_request_.get(), request);
   access_token_ = access_token;
 
   GURL url(GaiaUrls::GetInstance()->oauth2_issue_token_url());
   // GaiaOAuthClient uses id 0, so we use 1 to distinguish the requests in
   // unit tests.
   const int id = 1;
 
-  url_fetcher_.reset(URLFetcher::Create(id, url, URLFetcher::POST, this));
+  url_fetcher_ = URLFetcher::Create(id, url, URLFetcher::POST, this);
 
   url_fetcher_->SetRequestContext(context_);
   url_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                              net::LOAD_DO_NOT_SAVE_COOKIES);
   url_fetcher_->SetAutomaticallyRetryOnNetworkChanges(kNumRetries);
   url_fetcher_->AddExtraRequestHeader(
       base::StringPrintf(kAuthorizationHeaderFormat, access_token.c_str()));
 
   std::string body = base::StringPrintf(
       kIssueTokenBodyFormat,
@@ skipping 124 matching lines @@
     URLRequestContextGetter* context) {
   scoped_ptr<SupervisedUserRefreshTokenFetcher> fetcher(
       new SupervisedUserRefreshTokenFetcherImpl(oauth2_token_service,
                                                 account_id,
                                                 device_id,
                                                 context));
   return fetcher.Pass();
 }
 
 SupervisedUserRefreshTokenFetcher::~SupervisedUserRefreshTokenFetcher() {}