Gtk languages options page part 1: accept-languages configuration.

app/l10n_util.h

Index: app/l10n_util.h
diff --git a/app/l10n_util.h b/app/l10n_util.h
index 37a40cde35587fd826bf4ee53e7a9f716ece4f3b..eacb329a1ad59bf15b0d98bb875f253122fbd77b 100644
--- a/app/l10n_util.h
+++ b/app/l10n_util.h
@@ -402,6 +402,10 @@ void SortStrings(const std::string& locale,
 // en-US, es, fr, fi, pt-PT, pt-BR, etc.
 const std::vector<std::string>& GetAvailableLocales();
 
+// Returns a vector of locale codes usable for accept-languages.
+void GetAcceptLanguagesForLocale(const std::string& display_locale,
+                                 std::vector<std::string>* locale_codes);
+
 // A simple wrapper class for the bidirectional iterator of ICU.
 // This class uses the bidirectional iterator of ICU to split a line of
 // bidirectional texts into visual runs in its display order.