Made PropertyType handling even more explicit.

src/mark-compact.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 1617 matching lines @@
     // If the pair (value, details) at index i, i+1 is not
     // a transition or null descriptor, mark the value.
     PropertyDetails details(Smi::cast(contents->get(i + 1)));
 
     Object** slot = contents->data_start() + i;
     Object* value = *slot;
     if (!value->IsHeapObject()) continue;
 
     RecordSlot(slot, slot, *slot);
 
-    PropertyType type = details.type();
-    if (type < FIRST_PHANTOM_PROPERTY_TYPE) {
+    if (details.IsProperty()) {
       HeapObject* object = HeapObject::cast(value);
       MarkBit mark = Marking::MarkBitFrom(HeapObject::cast(object));
       if (!mark.Get()) {
         SetMark(HeapObject::cast(object), mark);
         marking_deque_.PushBlack(object);
       }
-    } else if (type == ELEMENTS_TRANSITION && value->IsFixedArray()) {
+    } else if (details.type() == ELEMENTS_TRANSITION && value->IsFixedArray()) {
       // For maps with multiple elements transitions, the transition maps are
       // stored in a FixedArray. Keep the fixed array alive but not the maps
       // that it refers to.
       HeapObject* object = HeapObject::cast(value);
       MarkBit mark = Marking::MarkBitFrom(HeapObject::cast(object));
       if (!mark.Get()) {
         SetMark(HeapObject::cast(object), mark);
       }
     }
   }
@@ skipping 2117 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal