Make non-Module generators only context allocate parameters.

test/debugger/debug/regress-3225.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: --noalways-opt
 
 Debug = debug.Debug
 
 var debug_step = 0;
 var failure = null;
 
 function listener(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.Break) return;
   try {
     if (debug_step == 0) {
@@ skipping 27 matching lines @@
 
 var foo = generator(1, 2);
 
 assertEquals(4, foo.next().value);
 assertEquals(3, foo.next().value);
 assertEquals(5, foo.next().value);
 assertEquals(5, foo.next().value);
 assertNull(failure);
 
 Debug.setListener(null);