Separate stub types from property types.

src/property.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 171 matching lines @@
 
 
 class LookupResult BASE_EMBEDDED {
  public:
   explicit LookupResult(Isolate* isolate)
       : isolate_(isolate),
         next_(isolate->top_lookup_result()),
         lookup_type_(NOT_FOUND),
         holder_(NULL),
         cacheable_(true),
-        details_(NONE, NONEXISTENT) {
+        details_(NONE, NULL_DESCRIPTOR) {
     isolate->SetTopLookupResult(this);
   }
 
   ~LookupResult() {
     ASSERT(isolate_->top_lookup_result() == this);
     isolate_->SetTopLookupResult(next_);
   }
 
   void DescriptorResult(JSObject* holder, PropertyDetails details, int number) {
     lookup_type_ = DESCRIPTOR_TYPE;
@@ skipping 27 matching lines @@
   }
 
   void InterceptorResult(JSObject* holder) {
     lookup_type_ = INTERCEPTOR_TYPE;
     holder_ = holder;
     details_ = PropertyDetails(NONE, INTERCEPTOR);
   }
 
   void NotFound() {
     lookup_type_ = NOT_FOUND;
-    details_ = PropertyDetails(NONE, NONEXISTENT);
+    details_ = PropertyDetails(NONE, NULL_DESCRIPTOR);
     holder_ = NULL;
   }
 
   JSObject* holder() {
     ASSERT(IsFound());
     return JSObject::cast(holder_);
   }
 
   JSProxy* proxy() {
     ASSERT(IsFound());
@@ skipping 167 matching lines @@
   JSReceiver* holder_;
   int number_;
   bool cacheable_;
   PropertyDetails details_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_