[debugger] flood function for stepping before calling it.

test/mjsunit/regress/regress-crbug-401915.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: --allow-natives-syntax --expose-debug-as debug
 
 Debug = debug.Debug;
 Debug.setListener(function() {});
 Debug.setBreakOnException();
 
 try {
   try {
-    %DebugPushPromise(new Promise(function() {}), function() {}, function() {});
+    %DebugPushPromise(new Promise(function() {}), function() {});
   } catch (e) {
   }
   throw new Error();
 } catch (e) {
 }
 
 Debug.setListener(null);