Convert alert() to notification bar.

chrome/browser/resources/options/chromeos_language_options.js

Index: chrome/browser/resources/options/chromeos_language_options.js
diff --git a/chrome/browser/resources/options/chromeos_language_options.js b/chrome/browser/resources/options/chromeos_language_options.js
index 838615f5b18d84064c7ff3b5c3e31db19d42c729..6a8c70853e46c78858c5d833d3e6039b222c1ee7 100644
--- a/chrome/browser/resources/options/chromeos_language_options.js
+++ b/chrome/browser/resources/options/chromeos_language_options.js
@@ -412,8 +412,9 @@ cr.define('options', function() {
       var languageCode = languageOptionsList.getSelectedLanguageCode();
       // Don't allow removing the language if it's as UI language.
       if (languageCode == templateData.currentUiLanguageCode) {
-        // TODO(satorux): Show the message in a nicer way. See above.
-        alert(localStrings.getString('this_language_is_currently_in_use'));
+        this.showNotification_(
+            localStrings.getString('this_language_is_currently_in_use'),
+            localStrings.getString('ok_button'));
         return;
       }
       // Disable input methods associated with |languageCode|.