[debugger] Migrate more debugger tests to inspector

test/mjsunit/es6/debug-stepout-tailcalls.js

-// Copyright 2016 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 --harmony-tailcalls
-
-"use strict";
-
-var Debug = debug.Debug
-var exception = null;
-var breaks = 0;
-
-function f(x) {
-  if (x > 0) {
-    return f(x - 1);      // Tail call
-  }
-  debugger;               // Break 0
-}
-
-function g(x) {
-  return f(x);            // Tail call
-}
-
-function h(x) {
-  g(x);                   // Not tail call
-}                         // Break 1
-
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    assertTrue(event_data.sourceLineText().indexOf(`Break ${breaks++}`) > 0);
-    exec_state.prepareStep(Debug.StepAction.StepOut);
-  } catch (e) {
-    exception = e;
-  };
-};
-
-Debug.setListener(listener);
-
-h(3);
-
-Debug.setListener(null);  // Break 2
-assertNull(exception);
-assertEquals(3, breaks);