Rewrite scoped_ptr<T>(NULL) to use the default ctor in net/.

net/url_request/url_fetcher_core.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 "net/url_request/url_fetcher_core.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 51 matching lines @@
     URLFetcherCore::g_registry = LAZY_INSTANCE_INITIALIZER;
 
 URLFetcherCore::URLFetcherCore(URLFetcher* fetcher,
                                const GURL& original_url,
                                URLFetcher::RequestType request_type,
                                URLFetcherDelegate* d)
     : fetcher_(fetcher),
       original_url_(original_url),
       request_type_(request_type),
       delegate_(d),
-      delegate_task_runner_(
-          base::ThreadTaskRunnerHandle::Get()),
-      request_(NULL),
+      delegate_task_runner_(base::ThreadTaskRunnerHandle::Get()),
       load_flags_(LOAD_NORMAL),
       response_code_(URLFetcher::RESPONSE_CODE_INVALID),
       buffer_(new IOBuffer(kBufferSize)),
       url_request_data_key_(NULL),
       was_fetched_via_proxy_(false),
       upload_content_set_(false),
       upload_range_offset_(0),
       upload_range_length_(0),
       is_chunked_upload_(false),
       was_cancelled_(false),
@@ skipping 846 matching lines @@
 }
 
 void URLFetcherCore::InformDelegateDownloadDataInDelegateThread(
     scoped_ptr<std::string> download_data) {
   DCHECK(delegate_task_runner_->BelongsToCurrentThread());
   if (delegate_)
     delegate_->OnURLFetchDownloadData(fetcher_, download_data.Pass());
 }
 
 }  // namespace net