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

content/browser/devtools/devtools_protocol.cc

 // Copyright (c) 2013 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 "content/browser/devtools/devtools_protocol.h"
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/strings/stringprintf.h"
 
@@ skipping 107 matching lines @@
 
 DevToolsProtocol::Response::Response(int id, DictionaryValue* result)
     : id_(id),
       result_(result),
       error_code_(0) {
 }
 
 DevToolsProtocol::Response::Response(int id,
                                      int error_code,
                                      const std::string& error_message)
-    : id_(id),
-      result_(NULL),
-      error_code_(error_code),
-      error_message_(error_message) {
-}
+    : id_(id), error_code_(error_code), error_message_(error_message) {}
 
 DevToolsProtocol::Response::~Response() {
 }
 
 DevToolsProtocol::Notification::Notification(const std::string& method,
                                              DictionaryValue* params)
     : Message(method, params) {
 }
 
 DevToolsProtocol::Notification::~Notification() {
@@ skipping 114 matching lines @@
     Response response(0, kErrorParseError, error_message);
     if (error_response)
       *error_response = response.Serialize();
     return NULL;
   }
 
   return static_cast<DictionaryValue*>(message.release());
 }
 
 }  // namespace content