Issue 3430 - Get rid of expression closure in EHH`s common.js

chrome/content/common.js

 /*
  * This Source Code is subject to the terms of the Mozilla Public License
  * version 2.0 (the "License"). You can obtain a copy of the License at
  * http://mozilla.org/MPL/2.0/.
  */
 
 const Cc = Components.classes;
 const Ci = Components.interfaces;
 const Cr = Components.results;
 const Cu = Components.utils;
 
 Cu.import("resource://gre/modules/Services.jsm");
 
 function require(module)
 {
   let result = {};
   result.wrappedJSObject = result;
   Services.obs.notifyObservers(result, "elemhidehelper-require", module);
   return result.exports;
 }
 
-function E(id) document.getElementById(id);
+function E(id)
+{
+  return document.getElementById(id);
+}