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

test/mjsunit/debug-multiple-breakpoints.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 21 matching lines @@
 // Simple debug event handler which just counts the number of break points hit.
 var break_point_hit_count;
 
 function listener(event, exec_state, event_data, data) {
   if (event == Debug.DebugEvent.Break) {
     break_point_hit_count++;
   }
 };
 
 // Add the debug event listener.
-Debug.addListener(listener);
+Debug.setListener(listener);
 
 // Test functions
 function f() {a=1;b=2;};
 function g() {f();}
 function h() {}
 
 // This test sets several break points at the same place and checks that
 // several break points at the same place only makes one debug break event
 // and that when the last break point is removed no more debug break events
 // occours.
@@ skipping 43 matching lines @@
   bps[i] = Debug.setBreakPoint(h);
   h();
 }
 for (var i = 0; i < test_count; i++) {
   h();
   Debug.clearBreakPoint(bps[i]);
 }
 assertEquals(test_count * 2, break_point_hit_count);
 h();
 assertEquals(test_count * 2, break_point_hit_count);