Changed runtime system to preserve the global property cells for deleted prop...

src/runtime.cc

 // Copyright 2006-2008 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 1861 matching lines @@
         Object* obj = cache->Put(receiver_map, key, offset);
         if (obj->IsFailure()) return obj;
         Heap::SetKeyedLookupCache(LookupCache::cast(obj));
         Object* value = receiver->FastPropertyAt(offset);
         return value->IsTheHole() ? Heap::undefined_value() : value;
       }
     } else {
       // Attempt dictionary lookup.
       Dictionary* dictionary = receiver->property_dictionary();
       int entry = dictionary->FindStringEntry(key);
-      if ((entry != DescriptorArray::kNotFound) &&
+      if ((entry != Dictionary::kNotFound) &&
           (dictionary->DetailsAt(entry).type() == NORMAL)) {
         Object* value = dictionary->ValueAt(entry);
         if (receiver->IsJSGlobalObject()) {
            value = JSGlobalPropertyCell::cast(value)->value();
         }
         return value;
       }
     }
   }
 
@@ skipping 4238 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage();
   }
 }
 
 
 } }  // namespace v8::internal