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

net/http/http_transaction_unittest.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_transaction_unittest.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
@@ skipping 137 matching lines @@
 }
 
 //-----------------------------------------------------------------------------
 
 // static
 int TestTransactionConsumer::quit_counter_ = 0;
 
 TestTransactionConsumer::TestTransactionConsumer(
     net::RequestPriority priority,
     net::HttpTransactionFactory* factory)
-    : state_(IDLE),
-      trans_(NULL),
-      error_(net::OK) {
+    : state_(IDLE), error_(net::OK) {
   // Disregard the error code.
   factory->CreateTransaction(priority, &trans_, NULL);
   ++quit_counter_;
 }
 
 TestTransactionConsumer::~TestTransactionConsumer() {
 }
 
 void TestTransactionConsumer::Start(const net::HttpRequestInfo* request,
                                     const net::BoundNetLog& net_log) {
@@ skipping 262 matching lines @@
 
     if (rv > 0)
       content.append(buf->data(), rv);
     else if (rv < 0)
       return rv;
   } while (rv > 0);
 
   result->swap(content);
   return net::OK;
 }