Minor LookupIterator cleanups

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 35 matching lines @@
   enum PropertyKind {
     DATA,
     ACCESSOR
   };
 
   enum PropertyEncoding {
     DICTIONARY,
     DESCRIPTOR
   };
 
-  explicit LookupIterator(const LookupIterator* other)
-      : configuration_(other->configuration_),
-        state_(other->state_),
-        property_kind_(other->property_kind_),
-        property_encoding_(other->property_encoding_),
-        property_details_(other->property_details_),
-        isolate_(other->isolate_),
-        name_(other->name_),
-        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, NORMAL, Representation::None()),
         isolate_(name->GetIsolate()),
         name_(name),
         maybe_receiver_(receiver),
         number_(DescriptorArray::kNotFound) {
     Handle<JSReceiver> root = GetRoot();
-    holder_map_ = handle(root->map());
+    holder_map_ = handle(root->map(), isolate_);
     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, NORMAL, Representation::None()),
         isolate_(name->GetIsolate()),
         name_(name),
-        holder_map_(holder->map()),
+        holder_map_(holder->map(), isolate_),
         maybe_receiver_(receiver),
         maybe_holder_(holder),
         number_(DescriptorArray::kNotFound) {
     Next();
   }
 
   Isolate* isolate() const { return isolate_; }
   State state() const { return state_; }
   Handle<Name> name() const { return name_; }
 
@@ skipping 144 matching lines @@
   MaybeHandle<Object> maybe_receiver_;
   MaybeHandle<JSReceiver> maybe_holder_;
 
   int number_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOOKUP_H_