[debug-wrapper] Adapt tests, breakpoint.actual_location

test/debugger/debug/regress/regress-crbug-491943.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: --expose-debug-as debug
 
 var Debug = debug.Debug;
 var receiver = null;
 
 Debug.setListener(function(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.Break) return;
   receiver = exec_state.frame(0).evaluate('this').value();
 });
 
 
 function f() {
   var context_local = 1;
   (function() { return context_local; })();
   debugger;
 }
 
 var expected = {};
 f.call(expected);
 
 assertEquals(expected, receiver);