[proxies] Fix Object.prototype.hasOwnProperty

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 7165 matching lines @@
 Maybe<bool> JSReceiver::HasProperty(Handle<JSReceiver> object,
                                     Handle<Name> name) {
   LookupIterator it =
       LookupIterator::PropertyOrElement(object->GetIsolate(), object, name);
   return HasProperty(&it);
 }
 
 
 Maybe<bool> JSReceiver::HasOwnProperty(Handle<JSReceiver> object,
                                        Handle<Name> name) {
-  LookupIterator it = LookupIterator::PropertyOrElement(
-      object->GetIsolate(), object, name, LookupIterator::HIDDEN);
-  return HasProperty(&it);
+  if (object->IsJSObject()) {  // Shortcut
+    LookupIterator it = LookupIterator::PropertyOrElement(
+        object->GetIsolate(), object, name, LookupIterator::HIDDEN);
+    return HasProperty(&it);
+  }
+
+  Maybe<PropertyAttributes> attributes =
+      JSReceiver::GetOwnPropertyAttributes(object, name);
+  MAYBE_RETURN(attributes, Nothing<bool>());
+  return Just(attributes.FromJust() != ABSENT);
 }
 
 
 Maybe<PropertyAttributes> JSReceiver::GetPropertyAttributes(
     Handle<JSReceiver> object, Handle<Name> name) {
   LookupIterator it =
       LookupIterator::PropertyOrElement(name->GetIsolate(), object, name);
   return GetPropertyAttributes(&it);
 }
 
 
 Maybe<PropertyAttributes> JSReceiver::GetOwnPropertyAttributes(
     Handle<JSReceiver> object, Handle<Name> name) {
   LookupIterator it = LookupIterator::PropertyOrElement(
       name->GetIsolate(), object, name, LookupIterator::HIDDEN);
   return GetPropertyAttributes(&it);
 }
 
 
 Maybe<bool> JSReceiver::HasElement(Handle<JSReceiver> object, uint32_t index) {
   LookupIterator it(object->GetIsolate(), object, index);
   return HasProperty(&it);
 }
 
 
-Maybe<bool> JSReceiver::HasOwnElement(Handle<JSReceiver> object,
-                                      uint32_t index) {
-  LookupIterator it(object->GetIsolate(), object, index,
-                    LookupIterator::HIDDEN);
-  return HasProperty(&it);
-}
-
-
 Maybe<PropertyAttributes> JSReceiver::GetElementAttributes(
     Handle<JSReceiver> object, uint32_t index) {
   Isolate* isolate = object->GetIsolate();
   LookupIterator it(isolate, object, index);
   return GetPropertyAttributes(&it);
 }
 
 
 Maybe<PropertyAttributes> JSReceiver::GetOwnElementAttributes(
     Handle<JSReceiver> object, uint32_t index) {
@@ skipping 654 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_