Remove the holder_ field from LookupResult

src/property.cc

 // 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.
 
 #include "src/property.h"
 
 #include "src/handles-inl.h"
 #include "src/ostreams.h"
 
 namespace v8 {
 namespace internal {
 
 void LookupResult::Iterate(ObjectVisitor* visitor) {
   LookupResult* current = this;  // Could be NULL.
   while (current != NULL) {
-    visitor->VisitPointer(bit_cast<Object**>(&current->holder_));
     visitor->VisitPointer(bit_cast<Object**>(&current->transition_));
     current = current->next_;
   }
 }
 
 
 std::ostream& operator<<(std::ostream& os, const LookupResult& r) {
   if (!r.IsFound()) return os << "Not Found\n";
 
   os << "LookupResult:\n";
@@ skipping 70 matching lines @@
   if (value->IsAccessorPair()) {
     AccessorPair* pair = AccessorPair::cast(value);
     os << "(get: " << Brief(pair->getter())
        << ", set: " << Brief(pair->setter()) << ") ";
   }
   os << FastPropertyDetails(d.GetDetails());
   return os;
 }
 
 } }  // namespace v8::internal