Allow country-specific languages in UI list at OOBE.

ui/base/l10n/l10n_util.h

Index: ui/base/l10n/l10n_util.h
diff --git a/ui/base/l10n/l10n_util.h b/ui/base/l10n/l10n_util.h
index 4eb6d58114f5a235e64b9a725a6fbd02e19352c9..7ed51a325e6ca6749662f60a31d275880c93cd23 100644
--- a/ui/base/l10n/l10n_util.h
+++ b/ui/base/l10n/l10n_util.h
@@ -21,6 +21,10 @@
 
 namespace l10n_util {
 
+// The same as base::i18n::GetCanonicalLocale(const char*), but takes
+// std::string as an argument.
+std::string GetCanonicalLocale(const std::string& locale);
+
 // This method translates a generic locale name to one of the locally defined
 // ones. This method returns true if it succeeds.
 UI_BASE_EXPORT bool CheckAndResolveLocale(const std::string& locale,