[debugger] Basic scope functionality and exception events in wrapper

test/mjsunit/regress/regress-crbug-633999.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 --allow-natives-syntax --noturbo
-
-var Debug = debug.Debug
-var exception = null;
-var step = 0;
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Exception) return;
-  try {
-    step++;
-  } catch (e) {
-    exception = e;
-  }
-}
-
-Debug.setBreakOnException();
-Debug.setListener(listener);
-
-(function () {
-  "use asm";
-  function f() {
-    try {
-      throw 666;
-    } catch (e) {
-    }
-  }
-  f();
-  f();
-  %OptimizeFunctionOnNextCall(f);
-  f();
-  assertOptimized(f);
-})();
-
-Debug.setListener(null);
-assertNull(exception);
-assertEquals(3, step);