Show native language names in the add language overlay.

chrome/browser/chromeos/input_method/input_method_util.cc

Index: chrome/browser/chromeos/input_method/input_method_util.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_util.cc b/chrome/browser/chromeos/input_method/input_method_util.cc
index 01fa576c77b18a14274c840edb9c12b960be0110..b044bd956892b4f937020ab5661dc499e4515539 100644
--- a/chrome/browser/chromeos/input_method/input_method_util.cc
+++ b/chrome/browser/chromeos/input_method/input_method_util.cc
@@ -499,6 +499,13 @@ std::wstring GetLanguageDisplayNameFromCode(const std::string& language_code) {
           true)));
 }
 
+std::wstring GetLanguageNativeDisplayNameFromCode(
+    const std::string& language_code) {
+  return MaybeRewriteLanguageName(UTF16ToWide(
+      l10n_util::GetDisplayNameForLocale(
+          language_code, language_code, true)));
+}
+
 void SortLanguageCodesByNames(std::vector<std::string>* language_codes) {
   if (!g_browser_process) {
     return;