Free up 11 bits in fast-mode PropertyDetails by removing the enumeration-index.

src/property.cc

 // 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 94 matching lines @@
       break;
   }
 }
 
 
 void Descriptor::Print(FILE* out) {
   PrintF(out, "Descriptor ");
   GetKey()->ShortPrint(out);
   PrintF(out, " @ ");
   GetValue()->ShortPrint(out);
-  PrintF(out, " %d\n", GetDetails().descriptor_index());
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal