[debug-wrapper] Further extend the debug wrapper

test/mjsunit/regress/regress-3960.js

-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax
-
-// Test that setting break point works correctly when the debugger is
-// activated late, which leads to duplicate shared function infos.
-
-(function() {
-  var Debug = %GetDebugContext().Debug;
-
-  function listener(event, exec_state, event_data, data) {
-    if (event != Debug.DebugEvent.Break) return;
-    try {
-      assertTrue(/foo/.test(exec_state.frame(0).sourceLineText()));
-      break_count++;
-    } catch (e) {
-      exception = e;
-    }
-  }
-
-  for (var i = 0; i < 3; i++) {
-    var foo = function() { a = 1; }
-    var exception = null;
-    var break_count = 0;
-    Debug.setListener(listener);
-    if (i < 2) Debug.setBreakPoint(foo, 0, 0);
-    assertTrue(/\[B\d\]a = 1/.test(Debug.showBreakPoints(foo)));
-    foo();
-    assertEquals(1, break_count);
-    assertNull(exception);
-  }
-
-  Debug.setListener(null);
-})();