Use drop-down UI for "add language".

chrome/browser/resources/options/language_add_language_overlay.js

Index: chrome/browser/resources/options/language_add_language_overlay.js
diff --git a/chrome/browser/resources/options/language_add_language_overlay.js b/chrome/browser/resources/options/language_add_language_overlay.js
index d5ebf93554ebc669ecb22d4790b391333da2a91b..526ca4836001e676969b60888972d786810dba38 100644
--- a/chrome/browser/resources/options/language_add_language_overlay.js
+++ b/chrome/browser/resources/options/language_add_language_overlay.js
@@ -48,21 +48,10 @@ cr.define('options', function() {
           displayText += ' - ' + language.nativeDisplayName;
         }
 
-        if (cr.isChromeOS) {
-          var button = document.createElement('button');
-          button.className = 'link-button';
-          button.textContent = displayText;
-          button.languageCode = language.code;
-          var li = document.createElement('li');
-          li.languageCode = language.code;
-          li.appendChild(button);
-          addLanguageList.appendChild(li);
-        } else {
-          var option = document.createElement('option');
-          option.value = language.code;
-          option.textContent = displayText;
-          addLanguageList.appendChild(option);
-        }
+        var option = document.createElement('option');

[Dan Beam, 2013/02/01 19:38:10]

nit: cr.doc.createElement() or this.ownerDocument.createElement() IMO

[Seigo Nonaka, 2013/02/04 06:10:45]

Done.

+        option.value = language.code;
+        option.textContent = displayText;
+        addLanguageList.appendChild(option);
       }
     },
   };