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

chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc

Index: chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
diff --git a/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc b/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
index 8a8b009155a903623419459db0c7c24f9b3d7dd0..9c20c7908c6ca2a862ef10db7a7ae1e78044128d 100644
--- a/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
+++ b/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
@@ -138,16 +138,15 @@ void CupsPrintersHandler::HandleGetCupsPrintersList(
   std::vector<std::unique_ptr<Printer>> printers =
       PrintersManagerFactory::GetForBrowserContext(profile_)->GetPrinters();
 
-  base::ListValue* printers_list = new base::ListValue;
+  auto printers_list = base::MakeUnique<base::ListValue>();
   for (const std::unique_ptr<Printer>& printer : printers) {
     std::unique_ptr<base::DictionaryValue> printer_info =
         GetPrinterInfo(*printer.get());
     printers_list->Append(std::move(printer_info));
   }
 
-  std::unique_ptr<base::DictionaryValue> response =
-      base::MakeUnique<base::DictionaryValue>();
-  response->Set("printerList", printers_list);
+  auto response = base::MakeUnique<base::DictionaryValue>();
+  response->Set("printerList", std::move(printers_list));
   ResolveJavascriptCallback(base::Value(callback_id), *response);
 }