[debugger] Basic scope functionality and exception events in wrapper

test/mjsunit/es6/regress/regress-3280.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
-
-var Debug = debug.Debug;
-
-var listener_called;
-
-function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break) {
-    listener_called = true;
-    exec_state.frame().allScopes();
-  }
-}
-
-Debug.setListener(listener);
-
-function *generator_local_2(a) {
-  debugger;
-}
-generator_local_2(1).next();
-
-assertTrue(listener_called, "listener not called");