Changed the debugger API to allow only one debug event listener to be registe...

test/mjsunit/debug-stepin-constructor.js

Index: test/mjsunit/debug-stepin-constructor.js
===================================================================
--- test/mjsunit/debug-stepin-constructor.js	(revision 1198)
+++ test/mjsunit/debug-stepin-constructor.js	(working copy)
@@ -45,7 +45,7 @@
 };
 
 // Add the debug event listener.
-Debug.addListener(listener);
+Debug.setListener(listener);
 
 // Test step into constructor with simple constructor.
 function X() {
@@ -71,4 +71,4 @@
 assertEquals(4, break_break_point_hit_count);
 
 // Get rid of the debug event listener.
-Debug.removeListener(listener);
+Debug.setListener(null);