[debugger] Further stepping support in test wrapper

test/debugger/debug/debug-stepin-function-call.js

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-// Flags: --expose-debug-as debug
-// Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
 var exception = null;
 var state = 0;
 
 // Simple debug event handler which first time will cause 'step in' action
 // to get into g.call and than check that execution is pauesed inside
 // function 'g'.
 function listener(event, exec_state, event_data, data) {
   try {
@@ skipping 126 matching lines @@
 // Test global bound function.
 state = 0;
 var globalBound = g.bind(null, 3);
 debugger;
 globalBound();
 assertNull(exception);
 assertEquals(3, state);
 
 // Get rid of the debug event listener.
 Debug.setListener(null);