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

chrome/common/localized_error.cc

Index: chrome/common/localized_error.cc
diff --git a/chrome/common/localized_error.cc b/chrome/common/localized_error.cc
index 5a969bc5fbe5555f1cbf69ba61171aa0d6e29a6c..71273aa0576a1e7f03374517c7c4ffbf0e7fbf32 100644
--- a/chrome/common/localized_error.cc
+++ b/chrome/common/localized_error.cc
@@ -519,7 +519,7 @@ void LocalizedError::GetStrings(int error_code,
                                 base::DictionaryValue* error_strings) {
   bool rtl = LocaleIsRTL();
   error_strings->SetString("textdirection", rtl ? "rtl" : "ltr");
-  webui::SetFontAndTextDirection(error_strings);
+  webui::SetTextDirection(error_strings);
 
   // Grab the strings and settings that depend on the error type.  Init
   // options with default values.