Remove base::Value::CreateNullValue

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
index f22ec21c31edb955798a638f74905ae4002f377c..8ab3ddd53057ed58b09fc5ba6d62b5c18a8ac284 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
@@ -1311,7 +1311,7 @@ void PrintPreviewHandler::SendPrinterSetup(
     std::unique_ptr<base::DictionaryValue> destination_info) {
   auto response = base::MakeUnique<base::DictionaryValue>();
   bool success = true;
-  auto caps_value = base::Value::CreateNullValue();
+  auto caps_value = base::MakeUnique<base::Value>();
   auto caps = base::MakeUnique<base::DictionaryValue>();
   if (destination_info &&
       destination_info->Remove(printing::kPrinterCapabilities, &caps_value) &&