Add "own" symbols support.

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 29 matching lines @@
   };
 
   enum PropertyEncoding {
     DICTIONARY,
     DESCRIPTOR
   };
 
   LookupIterator(Handle<Object> receiver,
                  Handle<Name> name,
                  Configuration configuration = CHECK_ALL)
-      : configuration_(configuration),
+      : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         property_kind_(DATA),
         property_encoding_(DESCRIPTOR),
         property_details_(NONE, NONEXISTENT, 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_ALL)
-      : configuration_(configuration),
+      : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         property_kind_(DATA),
         property_encoding_(DESCRIPTOR),
         property_details_(NONE, NONEXISTENT, Representation::None()),
         isolate_(name->GetIsolate()),
         name_(name),
         holder_map_(holder->map()),
         maybe_receiver_(receiver),
         maybe_holder_(holder),
         number_(DescriptorArray::kNotFound) {
@@ skipping 100 matching lines @@
     DCHECK(has_property_);
     DCHECK_EQ(DESCRIPTOR, property_encoding_);
     return number_;
   }
   int dictionary_entry() const {
     DCHECK(has_property_);
     DCHECK_EQ(DICTIONARY, property_encoding_);
     return number_;
   }
 
+  static Configuration ComputeConfiguration(
+      Configuration configuration, Handle<Name> name) {
+    if (name->IsOwn()) {
+      return static_cast<Configuration>(configuration & CHECK_OWN);
+    } else {
+      return configuration;
+    }
+  }
+
   Configuration configuration_;
   State state_;
   bool has_property_;
   PropertyKind property_kind_;
   PropertyEncoding property_encoding_;
   PropertyDetails property_details_;
   Isolate* isolate_;
   Handle<Name> name_;
   Handle<Map> holder_map_;
   MaybeHandle<Object> maybe_receiver_;
   MaybeHandle<JSReceiver> maybe_holder_;
 
   int number_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOOKUP_H_