Directly inline shared WebUI CSS declarations into the security and supervised user interstitials.

chrome/browser/ui/webui/about_ui.cc

Index: chrome/browser/ui/webui/about_ui.cc
diff --git a/chrome/browser/ui/webui/about_ui.cc b/chrome/browser/ui/webui/about_ui.cc
index 3dbe9e6de797bdb222faabc3d8a38fe0fd28c97a..62c3cc0a8a5625319245898fa9509ef9133eec8e 100644
--- a/chrome/browser/ui/webui/about_ui.cc
+++ b/chrome/browser/ui/webui/about_ui.cc
@@ -1039,7 +1039,7 @@ void AboutMemoryHandler::OnDetailsAvailable() {
   load_time_data.SetString(
       "summary_desc",
       l10n_util::GetStringUTF16(IDS_MEMORY_USAGE_SUMMARY_DESC));
-  webui::SetFontAndTextDirection(&load_time_data);
+  webui::SetTextDirection(&load_time_data);
   load_time_data.Set("jstemplateData", root.release());
 
   std::string data;