[debugger] Migrate more debugger tests to inspector

test/mjsunit/regress/regress-crbug-409614.js

-// Copyright 2014 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 error_count = 0;
-
-function f() {
-  return 0;  // Break
-}            // Break
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    if (exec_state.frame(0).sourceLineText().indexOf("Break") <0) {
-      error_count++;
-    }
-    exec_state.prepareStep(Debug.StepAction.StepIn);
-    f();  // We should not break in this call of f().
-  } catch (e) {
-    print(e + e.stack);
-    exception = e;
-  }
-}
-
-Debug.setListener(listener);
-
-debugger;  // Break
-f();       // Break
-
-Debug.setListener(null);  // Break
-
-assertNull(exception);
-assertEquals(0, error_count);