[debugger] Migrate more debugger tests to inspector

test/mjsunit/regress/regress-5559.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
-
-Debug = debug.Debug
-
-var exception = null;
-var break_count = 0;
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    print(event_data.sourceLineText());
-    assertTrue(
-        event_data.sourceLineText().indexOf(`Break ${break_count++}.`) > 0);
-    exec_state.prepareStep(Debug.StepAction.StepOut);
-  } catch (e) {
-    exception = e;
-  }
-};
-
-function thrower() {
-  try {
-    debugger;             // Break 0.
-    throw 'error';
-  } catch (err) {
-  }
-}
-
-
-Debug.setListener(listener);
-thrower();
-Debug.setListener(null);  // Break 1.
-
-assertNull(exception);
-assertEquals(2, break_count);