Fix memory leak in DevToolsProtocol::ParseCommand

chrome/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 "chrome/browser/devtools/devtools_protocol.h"
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/strings/stringprintf.h"
 
@@ skipping 111 matching lines @@
   int id;
   if (!command_dict->GetInteger(kIdParam, &id) || id < 0)
     return NULL;
 
   std::string method;
   if (!command_dict->GetString(kMethodParam, &method))
     return NULL;
 
   base::DictionaryValue* params = NULL;
   command_dict->GetDictionary(kParamsParam, &params);
-  return new Command(id, method, params ? params->DeepCopy() : NULL);
+  return new Command(id, method, params);
 }
 
 // static
 DevToolsProtocol::Notification* DevToolsProtocol::ParseNotification(
     const std::string& json) {
   scoped_ptr<base::Value> value(base::JSONReader::Read(json));
   if (!value || !value->IsType(base::Value::TYPE_DICTIONARY))
     return NULL;
 
   scoped_ptr<base::DictionaryValue> dict(
@@ skipping 20 matching lines @@
   int id;
   if (!dict->GetInteger(kIdParam, &id))
     return NULL;
 
   int error_code = 0;
   base::DictionaryValue* error_dict = NULL;
   if (dict->GetDictionary(kErrorParam, &error_dict))
     error_dict->GetInteger(kErrorCodeParam, &error_code);
   return new Response(id, error_code, std::string());
 }