Fix a memory leak in translate_prefs.cc.

chrome/browser/translate/translate_prefs.cc

 // Copyright (c) 2011 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/translate/translate_prefs.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 338 matching lines @@
     std::vector<std::string> accept_languages;
     base::SplitString(accept_languages_str, ',', &accept_languages);
 
     std::vector<std::string> blocked_languages;
     CreateBlockedLanguages(&blocked_languages,
                            blacklisted_languages,
                            accept_languages);
 
     // Create the new preference kPrefTranslateBlockedLanguages.
     {
-      ListValue* blocked_languages_list = new ListValue();
+      ListValue blocked_languages_list;
       for (std::vector<std::string>::const_iterator it =
                blocked_languages.begin();
            it != blocked_languages.end(); ++it) {
-        blocked_languages_list->Append(new StringValue(*it));
+        blocked_languages_list.Append(new StringValue(*it));
       }
       ListPrefUpdate update(user_prefs, kPrefTranslateBlockedLanguages);
       ListValue* list = update.Get();
       DCHECK(list != NULL);
-      list->Swap(blocked_languages_list);
+      list->Swap(&blocked_languages_list);
     }
 
     // Update kAcceptLanguages
     for (std::vector<std::string>::const_iterator it =
              blocked_languages.begin();
          it != blocked_languages.end(); ++it) {
       std::string lang = *it;
       TranslateUtil::ToChromeLanguageSynonym(&lang);
       bool not_found =
           std::find(accept_languages.begin(), accept_languages.end(), lang) ==
@@ skipping 98 matching lines @@
 
 bool TranslatePrefs::IsListEmpty(const char* pref_id) const {
   const ListValue* blacklist = prefs_->GetList(pref_id);
   return (blacklist == NULL || blacklist->empty());
 }
 
 bool TranslatePrefs::IsDictionaryEmpty(const char* pref_id) const {
   const DictionaryValue* dict = prefs_->GetDictionary(pref_id);
   return (dict == NULL || dict->empty());
 }