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

net/ftp/ftp_network_transaction.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/ftp/ftp_network_transaction.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/metrics/histogram.h"
@@ skipping 194 matching lines @@
 FtpNetworkTransaction::FtpNetworkTransaction(
     FtpNetworkSession* session,
     ClientSocketFactory* socket_factory)
     : command_sent_(COMMAND_NONE),
       io_callback_(base::Bind(&FtpNetworkTransaction::OnIOComplete,
                               base::Unretained(this))),
       session_(session),
       request_(NULL),
       resolver_(session->host_resolver()),
       read_ctrl_buf_(new IOBuffer(kCtrlBufLen)),
-      ctrl_response_buffer_(NULL),
       read_data_buf_len_(0),
       last_error_(OK),
       system_type_(SYSTEM_TYPE_UNKNOWN),
       // Use image (binary) transfer by default. It should always work,
       // whereas the ascii transfer may damage binary data.
       data_type_(DATA_TYPE_IMAGE),
       resource_type_(RESOURCE_TYPE_UNKNOWN),
       use_epsv_(true),
       data_connection_port_(0),
       socket_factory_(socket_factory),
       next_state_(STATE_NONE),
-      state_after_data_connect_complete_(STATE_CTRL_WRITE_SIZE) {
-}
+      state_after_data_connect_complete_(STATE_CTRL_WRITE_SIZE) {}
 
 FtpNetworkTransaction::~FtpNetworkTransaction() {
 }
 
 int FtpNetworkTransaction::Stop(int error) {
   if (command_sent_ == COMMAND_QUIT)
     return error;
 
   next_state_ = STATE_CTRL_WRITE_QUIT;
   last_error_ = error;
@@ skipping 1154 matching lines @@
   if (!had_error_type[type]) {
     had_error_type[type] = true;
     UMA_HISTOGRAM_ENUMERATION("Net.FtpDataConnectionErrorHappened",
         type, NUM_OF_NET_ERROR_TYPES);
   }
   UMA_HISTOGRAM_ENUMERATION("Net.FtpDataConnectionErrorCount",
       type, NUM_OF_NET_ERROR_TYPES);
 }
 
 }  // namespace net