Handle Delete of element with LookupIterator

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 1175 matching lines @@
     iter.Advance();
   }
   return PrototypeIterator::GetCurrent(iter);
 }
 
 
 MaybeHandle<Object> Object::GetProperty(Isolate* isolate,
                                         Handle<Object> object,
                                         const char* name) {
   Handle<String> str = isolate->factory()->InternalizeUtf8String(name);
-  DCHECK(!str.is_null());
-#ifdef DEBUG
-  uint32_t index;  // Assert that the name is not an array index.
-  DCHECK(!str->AsArrayIndex(&index));
-#endif  // DEBUG
   return GetProperty(object, str);
 }
 
 
 MaybeHandle<Object> JSProxy::SetElementWithHandler(Handle<JSProxy> proxy,
                                                    Handle<JSReceiver> receiver,
                                                    uint32_t index,
                                                    Handle<Object> value,
                                                    LanguageMode language_mode) {
   Isolate* isolate = proxy->GetIsolate();
   Handle<String> name = isolate->factory()->Uint32ToString(index);
   return SetPropertyWithHandler(proxy, receiver, name, value, language_mode);
 }
 
 
-Maybe<bool> JSProxy::HasElementWithHandler(Handle<JSProxy> proxy,
-                                           uint32_t index) {
-  Isolate* isolate = proxy->GetIsolate();
-  Handle<String> name = isolate->factory()->Uint32ToString(index);
-  return HasPropertyWithHandler(proxy, name);
-}
-
-
 #define FIELD_ADDR(p, offset) \
   (reinterpret_cast<byte*>(p) + offset - kHeapObjectTag)
 
 #define FIELD_ADDR_CONST(p, offset) \
   (reinterpret_cast<const byte*>(p) + offset - kHeapObjectTag)
 
 #define READ_FIELD(p, offset) \
   (*reinterpret_cast<Object* const*>(FIELD_ADDR_CONST(p, offset)))
 
 #define ACQUIRE_READ_FIELD(p, offset)           \
@@ skipping 6445 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_