Incognito NTP style tweaks

content/browser/webui/shared_resources_data_source.cc

Index: content/browser/webui/shared_resources_data_source.cc
diff --git a/content/browser/webui/shared_resources_data_source.cc b/content/browser/webui/shared_resources_data_source.cc
index 3c7c01b7343f8fd2201b8db23ee9ae5f9b6f9fce..8383fc2220abec08c2353dde9c772a6cc7665484 100644
--- a/content/browser/webui/shared_resources_data_source.cc
+++ b/content/browser/webui/shared_resources_data_source.cc
@@ -92,6 +92,9 @@ void SharedResourcesDataSource::StartDataRequest(
   if (idr == IDR_WEBUI_CSS_TEXT_DEFAULTS) {
     std::string css = webui::GetWebUiCssTextDefaults();
     bytes = base::RefCountedString::TakeString(&css);
+  } else if (idr == IDR_WEBUI_CSS_TEXT_DEFAULTS_MD) {
+    std::string css = webui::GetWebUiCssTextDefaultsMd();
+    bytes = base::RefCountedString::TakeString(&css);
   } else {
     bytes = GetContentClient()->GetDataResourceBytes(idr);
   }