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

test/mjsunit/debug-conditional-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.
 count = 0;
 function f() {};
 function g() {h(count++)};
 function h(x) {var a=x;};
 
 
 // Conditional breakpoint which syntax error.
 break_point_hit_count = 0;
@@ skipping 109 matching lines @@
 bp1 = Debug.setBreakPoint(h, 0, 0, 'a % 2 == 0');
 bp2 = Debug.setBreakPoint(h, 0, 0, '(a + 1) % 2 == 0');
 for (var i = 0; i < 10; i++) {
   g();
 }
 assertEquals(10, break_point_hit_count);
 assertEquals(5, Debug.findBreakPoint(bp1, false).hit_count());
 assertEquals(5, Debug.findBreakPoint(bp2, false).hit_count());
 Debug.clearBreakPoint(bp1);
 Debug.clearBreakPoint(bp2);