Revert "Handle CALLBACKS correctly in IsProperty functions."

src/property-details.h

 // Copyright 2012 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 55 matching lines @@
   ELEMENTS_TRANSITION       = 7,
   CONSTANT_TRANSITION       = 8,  // only in fast mode
   NULL_DESCRIPTOR           = 9,  // only in fast mode
   // There are no IC stubs for NULL_DESCRIPTORS. Therefore,
   // NULL_DESCRIPTOR can be used as the type flag for IC stubs for
   // nonexistent properties.
   NONEXISTENT = NULL_DESCRIPTOR
 };
 
 
+inline bool IsRealProperty(PropertyType type) {
+  switch (type) {
+    case NORMAL:
+    case FIELD:
+    case CONSTANT_FUNCTION:
+    case CALLBACKS:
+    case HANDLER:
+    case INTERCEPTOR:
+      return true;
+    case MAP_TRANSITION:
+    case ELEMENTS_TRANSITION:
+    case CONSTANT_TRANSITION:
+    case NULL_DESCRIPTOR:
+      return false;
+  }
+  UNREACHABLE();  // keep the compiler happy
+  return false;
+}
+
+
 // PropertyDetails captures type and attributes for a property.
 // They are used both in property dictionaries and instance descriptors.
 class PropertyDetails BASE_EMBEDDED {
  public:
   PropertyDetails(PropertyAttributes attributes,
                   PropertyType type,
                   int index = 0) {
     ASSERT(TypeField::is_valid(type));
     ASSERT(AttributesField::is_valid(attributes));
     ASSERT(StorageField::is_valid(index));
@@ skipping 37 matching lines @@
 
   static const int kInitialIndex = 1;
 
  private:
   uint32_t value_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_DETAILS_H_