Backed out changeset 446bc40870fe (bug 1346812) for eslint failure in aboutTelemetry.js. r=backout on a CLOSED TREE

toolkit/content/aboutTelemetry.js

@@ -175,7 +175,7 @@ function removeAllChildNodes(node) {
  * Pad a number to two digits with leading "0".
  */
 function padToTwoDigits(n) {
-  return new String(n).padStart(2,"0");
+  return (n > 9) ? n : "0" + n;
 }
 
 /**