Revert of Stop passing raw pointers to base::Value API in c/b/ui

chrome/browser/ui/webui/options/language_options_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_H_
 
-#include <memory>
-
 #include "base/macros.h"
 #include "chrome/browser/ui/webui/options/language_options_handler_common.h"
 
-namespace base {
-class ListValue;
-}
-
 namespace options {
 
 // Language options UI page handler for non-Chrome OS platforms.  For Chrome OS,
 // see chromeos::CrosLanguageOptionsHandler.
 class LanguageOptionsHandler : public LanguageOptionsHandlerCommon {
  public:
   LanguageOptionsHandler();
   ~LanguageOptionsHandler() override;
 
   // OptionsPageUIHandler implementation.
   void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
 
   // WebUIMessageHandler implementation.
   void RegisterMessages() override;
 
   // The following static method is public for ease of testing.
 
   // Gets the list of languages from the given input descriptors.
   // The return value will look like:
   // [{'code': 'fi', 'displayName': 'Finnish', 'nativeDisplayName': 'suomi'},
   //  ...]
-  static std::unique_ptr<base::ListValue> GetLanguageList();
+  static base::ListValue* GetLanguageList();
 
  private:
   // LanguageOptionsHandlerCommon implementation.
   void SetApplicationLocale(const std::string& language_code) override;
 
   // Called when the restart button is clicked.
   void RestartCallback(const base::ListValue* args);
 
   DISALLOW_COPY_AND_ASSIGN(LanguageOptionsHandler);
 };
 
 }  // namespace options
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_H_