#429 some classNames maybe SVGAnimatedStrings and not have trim()

Author: revmischa

src/gmail.js

@@ -1582,7 +1582,7 @@ var Gmail_ = function(localJQuery) {
 
         // loop through each of the inserted elements classes & check for a defined observer on that class
         var cn = target.className || "";
-        var classes = cn.trim().split(/\s+/);
+        var classes = cn.trim ? cn.trim().split(/\s+/) : [];
         if(!classes.length) classes.push(""); // if no class, then check for anything observing nodes with no class
         $.each(classes, function(idx, className) {
             var observer = dom_observer_map[className];