Don't use deprecated ListValue::Append(Value*) overload.

chrome/browser/ui/webui/options/search_engine_manager_handler.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 "chrome/browser/ui/webui/options/search_engine_manager_handler.h"
 
 #include "base/bind.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 150 matching lines @@
 }
 
 void SearchEngineManagerHandler::OnItemsAdded(int start, int length) {
   OnModelChanged();
 }
 
 void SearchEngineManagerHandler::OnItemsRemoved(int start, int length) {
   OnModelChanged();
 }
 
-base::DictionaryValue* SearchEngineManagerHandler::CreateDictionaryForEngine(
-    int index, bool is_default) {
+std::unique_ptr<base::DictionaryValue>
+SearchEngineManagerHandler::CreateDictionaryForEngine(int index,
+                                                      bool is_default) {
   TemplateURLTableModel* table_model = list_controller_->table_model();
   const TemplateURL* template_url = list_controller_->GetTemplateURL(index);
 
   // The items which are to be written into |dict| are also described in
   // chrome/browser/resources/options/search_engine_manager_engine_list.js
   // in @typedef for SearchEngine. Please update it whenever you add or remove
   // any keys here.
-  base::DictionaryValue* dict = new base::DictionaryValue();
+  std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
   dict->SetString("name",  template_url->short_name());
   dict->SetString("displayName", table_model->GetText(
     index, IDS_SEARCH_ENGINES_EDITOR_DESCRIPTION_COLUMN));
   dict->SetString("keyword", table_model->GetText(
     index, IDS_SEARCH_ENGINES_EDITOR_KEYWORD_COLUMN));
   dict->SetString("url", template_url->url_ref().DisplayURL(
       UIThreadSearchTermsData(Profile::FromWebUI(web_ui()))));
   dict->SetBoolean("urlLocked", template_url->prepopulate_id() > 0);
   GURL icon_url = template_url->favicon_url();
   if (icon_url.is_valid())
@@ skipping 132 matching lines @@
 
   // Recheck validity.  It's possible to get here with invalid input if e.g. the
   // user calls the right JS functions directly from the web inspector.
   if (edit_controller_->IsTitleValid(name) &&
       edit_controller_->IsKeywordValid(keyword) &&
       edit_controller_->IsURLValid(url))
     edit_controller_->AcceptAddOrEdit(name, keyword, url);
 }
 
 }  // namespace options