Issue 5079 - Export ElemHideEmulation and splitSelector if possible

chrome/content/elemHideEmulation.js

 // We are currently limited to ECMAScript 5 in this file, because it is being
 // used in the browser tests. See https://issues.adblockplus.org/ticket/4796
 
 var propertySelectorRegExp = /\[\-abp\-properties=(["'])([^"']+)\1\]/;
 
 function splitSelector(selector)
 {
   if (selector.indexOf(",") == -1)
     return [selector];
 
@@ skipping 147 matching lines @@
 
       if (this.patterns.length > 0)
       {
         var document = this.window.document;
         this.addSelectors(document.styleSheets);
         document.addEventListener("load", this.onLoad.bind(this), true);
       }
     }.bind(this));
   }
 };
+
+if (typeof exports != "undefined")

[kzar, 2017/04/03 07:43:57]

Yes, potentially undeclared variables in content scripts again! I can't see how
else to do it though, since both exports and an element will have the type
"object". Also we're running this script in preload, so before that becomes a
problem. Also adding properties to the element which the page can't access
anyway doesn't seem to be a problem to me.

+{
+  exports.ElemHideEmulation = ElemHideEmulation;
+  exports.splitSelector = splitSelector;
+}