Fix failing test after r11924.

test/cctest/test-dictionary.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 116 matching lines @@
   v8::HandleScope scope;
   LocalContext context;
   Handle<ObjectHashTable> table = FACTORY->NewObjectHashTable(1);
   Handle<JSObject> key = FACTORY->NewJSArray(0);
 
   // Simulate a full heap so that generating an identity hash code
   // in subsequent calls will request GC.
   FLAG_gc_interval = 0;
 
   // Calling Lookup() should not cause GC ever.
-  CHECK(table->Lookup(*key)->IsUndefined());
+  CHECK(table->Lookup(*key)->IsTheHole());
 
   // Calling Put() should request GC by returning a failure.
   CHECK(table->Put(*key, *key)->IsRetryAfterGC());
 }
 #endif