Handle Delete of element with LookupIterator

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 41 matching lines @@
         property_details_(PropertyDetails::Empty()),
         isolate_(name->GetIsolate()),
         name_(name),
         // kMaxUInt32 isn't a valid index.
         index_(kMaxUInt32),
         receiver_(receiver),
         holder_(GetRoot(receiver_, isolate_)),
         holder_map_(holder_->map(), isolate_),
         initial_holder_(holder_),
         number_(DescriptorArray::kNotFound) {
+#if 0  // TODO(verwaest): Enable once blocking hacks are removed.
+#ifdef DEBUG
+    uint32_t index;  // Assert that the name is not an array index.
+    DCHECK(!name->AsArrayIndex(&index));
+#endif  // DEBUG
+#endif
     Next();
   }
 
   LookupIterator(Handle<Object> receiver, Handle<Name> name,
                  Handle<JSReceiver> holder,
                  Configuration configuration = PROTOTYPE_CHAIN)
       : configuration_(ComputeConfiguration(configuration, name)),
         state_(NOT_FOUND),
         exotic_index_state_(ExoticIndexState::kUninitialized),
         interceptor_state_(InterceptorState::kUninitialized),
         property_details_(PropertyDetails::Empty()),
         isolate_(name->GetIsolate()),
         name_(name),
         // kMaxUInt32 isn't a valid index.
         index_(kMaxUInt32),
         receiver_(receiver),
         holder_(holder),
         holder_map_(holder_->map(), isolate_),
         initial_holder_(holder_),
         number_(DescriptorArray::kNotFound) {
+#if 0  // TODO(verwaest): Enable once blocking hacks are removed.
+#ifdef DEBUG
+    uint32_t index;  // Assert that the name is not an array index.
+    DCHECK(!name->AsArrayIndex(&index));
+#endif  // DEBUG
+#endif
     Next();
   }
 
   LookupIterator(Isolate* isolate, Handle<Object> receiver, uint32_t index,
                  Configuration configuration = PROTOTYPE_CHAIN)
       : configuration_(configuration),
         state_(NOT_FOUND),
         exotic_index_state_(ExoticIndexState::kUninitialized),
         interceptor_state_(InterceptorState::kUninitialized),
         property_details_(PropertyDetails::Empty()),
@@ skipping 182 matching lines @@
   Handle<JSReceiver> holder_;
   Handle<Map> holder_map_;
   const Handle<JSReceiver> initial_holder_;
   uint32_t number_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LOOKUP_H_