Issue 2528 - Don't parse CSS selectors that have no comma

include.preload.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 132 matching lines @@
 }
 
 function convertSelectorsForShadowDOM(selectors)
 {
   var result = [];
   var prefix = "::content ";
 
   for (var i = 0; i < selectors.length; i++)
   {
     var selector = selectors[i];
+    if (selector.indexOf(",") == -1)
+    {
+      result.push(prefix + selector);
+      continue;
+    }
+
     var start = 0;
-
-    if (selector.indexOf(",") != -1)
-    {
-      var sep = "";
-
-      for (var j = 0; j < selector.length; j++)
-      {
-        var chr = selector[j];
-        if (chr == "\\")
-          j++;
-        else if (chr == sep)
-          sep = "";
-        else if (sep == "")
-        {
-          if (chr == '"' || chr == "'")
-            sep = chr;
-          else if (chr == ",")
-          {
-            result.push(prefix + selector.substring(start, j));
-            start = j + 1;
-          }
+    var sep = "";
+    for (var j = 0; j < selector.length; j++)
+    {
+      var chr = selector[j];
+      if (chr == "\\")
+        j++;
+      else if (chr == sep)
+        sep = "";
+      else if (sep == "")
+      {
+        if (chr == '"' || chr == "'")
+          sep = chr;
+        else if (chr == ",")
+        {
+          result.push(prefix + selector.substring(start, j));
+          start = j + 1;
         }
       }
     }
 
     result.push(prefix + selector.substring(start));
   }
 
   return result;
 }
 
@@ skipping 109 matching lines @@
   }, true);
 
   return updateStylesheet;
 }
 
 if (document instanceof HTMLDocument)
 {
   checkSitekey();
   window.updateStylesheet = init(document);
 }