give tabbed options clear browsing dialog a facelift

chrome/browser/resources/options/pref_ui.js

Index: chrome/browser/resources/options/pref_ui.js
diff --git a/chrome/browser/resources/options/pref_ui.js b/chrome/browser/resources/options/pref_ui.js
index 0734b6bce6ea7d68ff3309e4a58e5c6f7efa4a2a..2937335d4ad135eee3b8f732bb9e2feb1afd6d7d 100644
--- a/chrome/browser/resources/options/pref_ui.js
+++ b/chrome/browser/resources/options/pref_ui.js
@@ -280,7 +280,7 @@ cr.define('options', function() {
   /////////////////////////////////////////////////////////////////////////////
   // PrefSelect class:
 
-  // Define a constructor that uses an select element as its underlying element.
+  // Define a constructor that uses a select element as its underlying element.
   var PrefSelect = cr.ui.define('select');
 
   PrefSelect.prototype = {
@@ -331,6 +331,9 @@ cr.define('options', function() {
       // Listen to user events.
       this.addEventListener('change',
           function(e) {
+            if (!self.dataType)
+              console.error('unknown data type for <select> pref');
+
             switch(self.dataType) {
               case 'number':
                 Preferences.setIntegerPref(self.pref,