Add public API generation with cr.makePublic() and handle it in compiler pass

chrome/browser/resources/options/chromeos/keyboard_overlay.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('options', function() {
 
   /**
    * Auto-repeat delays (in ms) for the corresponding slider values, from
    * long to short. The values were chosen to provide a large range while giving
    * several options near the defaults.
@@ skipping 143 matching lines @@
 
         assert(index != -1,
                'Failed to update ' + id + ' from pref with value ' + value);
       }
 
       $(id).value = index;
     },
   };
 
   // Forward public APIs to private implementations.
-  [
+  cr.makePublic(KeyboardOverlay, [
     'showCapsLockOptions',
     'showDiamondKeyOptions',
-  ].forEach(function(name) {
-    KeyboardOverlay[name] = function() {
-      var instance = KeyboardOverlay.getInstance();
-      return instance[name + '_'].apply(instance, arguments);
-    };
-  });
+  ]);
 
   // Export
   return {
     KeyboardOverlay: KeyboardOverlay
   };
 });