Backed out changeset c47cd2b5f4a6 (bug 1266256) for various devtools failures 'A promise chain failed to handle a rejection: - [object Object]'. r=backout on a CLOSED TREE

devtools/server/actors/utils/TabSources.js

@@ -259,11 +259,6 @@ TabSources.prototype = {
    * @returns Boolean
    */
   _isMinifiedURL: function (aURL) {
-    // Filter out null URLs to avoid debug warnings.
-    if (!aUrl) {
-      return false;
-    }
-
     try {
       let url = new URL(aURL);
       let pathname = url.pathname;