This page uses a built-in function to call a user defined function. 

To run this test manually, load it in the browser then load the WebInspector and look at the profile. In the profile map() should have arrayOperatorFunction() as a child.

Profile title: Built-in function calls a user defined function
Thread_1 (no file) (line 0)
   startTest built-in-function-calls-user-defined-function.html (line 11)
      Array (no file) (line 0)
      map (no file) (line 0)
         arrayOperatorFunction profiler-test-JS-resources.js (line 25)
      endTest profiler-test-JS-resources.js (line 1)