Get rid of the NONEXISTENT PropertyType

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/heap/objects-visiting.h"
 #include "src/jsregexp.h"
@@ skipping 224 matching lines @@
         }
         case CONSTANT:
           os << Brief(descs->GetConstant(i)) << " (constant)\n";
           break;
         case CALLBACKS:
           os << Brief(descs->GetCallbacksObject(i)) << " (callback)\n";
           break;
         case NORMAL:  // only in slow mode
         case HANDLER:  // only in lookup results, not in descriptors
         case INTERCEPTOR:  // only in lookup results, not in descriptors
-        // There are no transitions in the descriptor array.
-        case NONEXISTENT:
           UNREACHABLE();
           break;
       }
     }
   } else {
     property_dictionary()->Print(os);
   }
 }
 
 
@@ skipping 113 matching lines @@
         case CONSTANT:
           os << " (transition to constant)\n";
           break;
         case CALLBACKS:
           os << " (transition to callback)\n";
           break;
         // Values below are never in the target descriptor array.
         case NORMAL:
         case HANDLER:
         case INTERCEPTOR:
-        case NONEXISTENT:
           UNREACHABLE();
           break;
       }
     }
   }
 }
 
 
 void JSObject::JSObjectPrint(OStream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "JSObject");
@@ skipping 709 matching lines @@
       case CONSTANT:
         os << " (transition to constant)\n";
         break;
       case CALLBACKS:
         os << " (transition to callback)\n";
         break;
       // Values below are never in the target descriptor array.
       case NORMAL:
       case HANDLER:
       case INTERCEPTOR:
-      case NONEXISTENT:
         UNREACHABLE();
         break;
     }
   }
   os << "\n";
 }
 
 
 #endif  // OBJECT_PRINT
 
 
 } }  // namespace v8::internal