Get rid of the NONEXISTENT PropertyType

src/lookup.h

 // Copyright 2014 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.
 
 #ifndef V8_LOOKUP_H_
 #define V8_LOOKUP_H_
 
 #include "src/factory.h"
 #include "src/isolate.h"
 #include "src/objects.h"
@@ skipping 51 matching lines @@
         holder_map_(other->holder_map_),
         maybe_receiver_(other->maybe_receiver_),
         maybe_holder_(other->maybe_holder_) {}
 
   LookupIterator(Handle<Object> receiver, Handle<Name> name,
                  Configuration configuration = CHECK_DERIVED)
       : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         property_kind_(DATA),
         property_encoding_(DESCRIPTOR),
-        property_details_(NONE, NONEXISTENT, Representation::None()),
+        property_details_(NONE, NORMAL, Representation::None()),
         isolate_(name->GetIsolate()),
         name_(name),
         maybe_receiver_(receiver),
         number_(DescriptorArray::kNotFound) {
     Handle<JSReceiver> root = GetRoot();
     holder_map_ = handle(root->map());
     maybe_holder_ = root;
     Next();
   }
 
   LookupIterator(Handle<Object> receiver, Handle<Name> name,
                  Handle<JSReceiver> holder,
                  Configuration configuration = CHECK_DERIVED)
       : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         property_kind_(DATA),
         property_encoding_(DESCRIPTOR),
-        property_details_(NONE, NONEXISTENT, Representation::None()),
+        property_details_(NONE, NORMAL, Representation::None()),
         isolate_(name->GetIsolate()),
         name_(name),
         holder_map_(holder->map()),
         maybe_receiver_(receiver),
         maybe_holder_(holder),
         number_(DescriptorArray::kNotFound) {
     Next();
   }
 
   Isolate* isolate() const { return isolate_; }
@@ skipping 128 matching lines @@
   MaybeHandle<Object> maybe_receiver_;
   MaybeHandle<JSReceiver> maybe_holder_;
 
   int number_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOOKUP_H_