[debugger] Migrate more debugger tests to inspector

test/mjsunit/es6/debug-break-default-constructor.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
-
-"use strict";
-
-var Debug = debug.Debug;
-var exception = null;
-var super_called = false;
-var step_count = 0;
-
-function listener(event, execState, eventData, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    execState.prepareStep(Debug.StepAction.StepIn);
-    var s = execState.frame().sourceLineText();
-    step_count++;
-    assertTrue(s.indexOf('// ' + step_count + '.') >= 0);
-  } catch (e) {
-    exception = e;
-  }
-}
-
-class Base {
-  constructor() {
-    var x = 1;     // 2.
-  }                // 3.
-}
-
-class Derived extends Base {}  // 1. // 4.
-
-Debug.setListener(listener);
-var bp = Debug.setBreakPoint(Derived, 0);
-
-new Derived();
-
-Debug.setListener(null);  // 5.
-
-assertNull(exception);
-assertEquals(5, step_count);