Migrate about:flags messages to const char*

components/flags_ui/flags_state.cc

Index: components/flags_ui/flags_state.cc
diff --git a/components/flags_ui/flags_state.cc b/components/flags_ui/flags_state.cc
index 2e8f1637ef48a0c34512c9d9618b0f57ea862d8a..d89c3629c352f633e5bc6def025d38f6d5acf74c 100644
--- a/components/flags_ui/flags_state.cc
+++ b/components/flags_ui/flags_state.cc
@@ -511,9 +511,9 @@ void FlagsState::GetFlagFeatureEntries(
 
     std::unique_ptr<base::DictionaryValue> data(new base::DictionaryValue());
     data->SetString("internal_name", entry.internal_name);
-    data->SetString("name", l10n_util::GetStringUTF16(entry.visible_name_id));
+    data->SetString("name", base::StringPiece(entry.visible_name));
     data->SetString("description",
-                    l10n_util::GetStringUTF16(entry.visible_description_id));
+                    base::StringPiece(entry.visible_description));
 
     base::ListValue* supported_platforms = new base::ListValue();
     AddOsStrings(entry.supported_platforms, supported_platforms);