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

chrome/browser/ui/webui/chromeos/login/network_screen_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_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/chromeos/base/locale_util.h"
 #include "chrome/browser/chromeos/login/screens/network_view.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 #include "ui/base/ime/chromeos/component_extension_ime_manager.h"
 #include "ui/base/ime/chromeos/input_method_manager.h"
 #include "ui/gfx/geometry/point.h"
 
+namespace base {
+class ListValue;
+}
+
 namespace chromeos {
 
 class CoreOobeView;
 
 // WebUI implementation of NetworkScreenView. It is used to interact with
 // the welcome screen (part of the page) of the OOBE.
 class NetworkScreenHandler : public NetworkView, public BaseScreenHandler {
  public:
   explicit NetworkScreenHandler(CoreOobeView* core_oobe_view);
   ~NetworkScreenHandler() override;
@@ skipping 11 matching lines @@
                             const base::string16& network_id) override;
   void ReloadLocalizedContent() override;
 
   // BaseScreenHandler implementation:
   void DeclareLocalizedValues(
       ::login::LocalizedValuesBuilder* builder) override;
   void GetAdditionalParameters(base::DictionaryValue* dict) override;
   void Initialize() override;
 
   // Returns available timezones. Caller gets the ownership.
-  static base::ListValue* GetTimezoneList();
+  static std::unique_ptr<base::ListValue> GetTimezoneList();
 
   CoreOobeView* core_oobe_view_ = nullptr;
   NetworkScreen* screen_ = nullptr;
 
   // Keeps whether screen should be shown right after initialization.
   bool show_on_init_ = false;
 
   // Position of the network control.
   gfx::Point network_control_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_