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

net/http/http_stream_parser.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/http/http_stream_parser.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
@@ skipping 162 matching lines @@
                                    GrowableIOBuffer* read_buffer,
                                    const BoundNetLog& net_log)
     : io_state_(STATE_NONE),
       request_(request),
       request_headers_(NULL),
       read_buf_(read_buffer),
       read_buf_unused_offset_(0),
       response_header_start_offset_(-1),
       response_body_length_(-1),
       response_body_read_(0),
-      chunked_decoder_(NULL),
       user_read_buf_(NULL),
       user_read_buf_len_(0),
       connection_(connection),
       net_log_(net_log),
       sent_last_chunk_(false),
       weak_ptr_factory_(this) {
   io_callback_ = base::Bind(&HttpStreamParser::OnIOComplete,
                             weak_ptr_factory_.GetWeakPtr());
 }
 
@@ skipping 752 matching lines @@
       request_body->IsInMemory() &&
       request_body->size() > 0) {
     size_t merged_size = request_headers.size() + request_body->size();
     if (merged_size <= kMaxMergedHeaderAndBodySize)
       return true;
   }
   return false;
 }
 
 }  // namespace net