Fix memory leak in AsyncExtensionFunction.

chrome/browser/extensions/execute_code_in_tab_function.cc

 // Copyright (c) 2009 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/extensions/execute_code_in_tab_function.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/extensions/extension_tabs_module.h"
 #include "chrome/browser/extensions/extension_tabs_module_constants.h"
 #include "chrome/browser/extensions/file_reader.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_error_utils.h"
 
 namespace keys = extension_tabs_module_constants;
 
 const wchar_t* kCodeKey = L"code";
 const wchar_t* kFileKey = L"file";
 
 bool ExecuteCodeInTabFunction::RunImpl() {
   EXTENSION_FUNCTION_VALIDATE(args_->IsType(Value::TYPE_LIST));
-  const ListValue* args = static_cast<const ListValue*>(args_);
+  const ListValue* args = args_as_list();
 
   DictionaryValue* script_info;
   EXTENSION_FUNCTION_VALIDATE(args->GetDictionary(1, &script_info));
   size_t number_of_value = script_info->GetSize();
   if (number_of_value == 0) {
     error_ = keys::kNoCodeOrFileToExecuteError;
     return false;
   } else if (number_of_value > 1) {
     error_ = keys::kMoreThanOneValuesError;
     return false;
@@ skipping 105 matching lines @@
 void ExecuteCodeInTabFunction::Observe(NotificationType type,
                                        const NotificationSource& source,
                                        const NotificationDetails& details) {
   std::pair<int, bool>* result_details =
       Details<std::pair<int, bool> >(details).ptr();
   if (result_details->first == request_id()) {
     SendResponse(result_details->second);
     Release();  // balanced in Execute()
   }
 }