[debugger] Basic scope functionality and exception events in wrapper

test/mjsunit/regress/regress-4703.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
-
-var exception = null;
-
-function listener(event, exec_state, event_data, data) {
-  if (event != debug.Debug.DebugEvent.Break) return;
-  try {
-    var all_scopes = exec_state.frame().allScopes();
-    assertEquals([ debug.ScopeType.Block,
-                   debug.ScopeType.Local,
-                   debug.ScopeType.Script,
-                   debug.ScopeType.Global ],
-                 all_scopes.map(scope => scope.scopeType()));
-  } catch (e) {
-    exception = e;
-    print(e);
-  }
-}
-
-debug.Debug.setListener(listener);
-
-(function(arg, ...rest) {
-  var one = 1;
-  function inner() {
-    one;
-    arg;
-  }
-  debugger;
-})();
-
-debug.Debug.setListener(null);
-assertNull(exception);