ambari-web/vendor/scripts/console-helper.js

// Make it safe to do console.log() always.
(function (con) {
  var method;
  var dummy = function() {};
  var methods = ('assert,count,debug,dir,dirxml,error,exception,group,' +
     'groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,' + 
     'time,timeEnd,trace,warn').split(',');
  while (method = methods.pop()) {
    con[method] = con[method] || dummy;
  }
})(window.console = window.console || {});