Introduce DefineOwnPropertyIgnoreAttributes and make it call SetPropertyWithInterceptor

src/objects.cc

 // Copyright 2013 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.
 
 #include <iomanip>
 #include <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 5060 matching lines @@
   // Make sure that the top context does not change when doing callbacks or
   // interceptor calls.
   AssertNoContextChange ncc(isolate);
 
   DCHECK_EQ(LookupIterator::INTERCEPTOR, it->state());
   Handle<InterceptorInfo> interceptor(it->GetInterceptor());
   if (interceptor->deleter()->IsUndefined()) return MaybeHandle<Object>();
 
   Handle<JSObject> holder = it->GetHolder<JSObject>();
 
+  // TODO(verwaest): Temporary workaround for blink pretending to delete
+  // elements that don't actually exist.
+  Maybe<PropertyAttributes> attributes =
+      GetPropertyAttributesWithInterceptor(it);
+  CHECK(attributes.IsJust());
+  if (attributes.FromJust() == ABSENT) return MaybeHandle<Object>();
+
   PropertyCallbackArguments args(isolate, interceptor->data(),
                                  *it->GetReceiver(), *holder);
   v8::Handle<v8::Boolean> result;
   if (it->IsElement()) {
     uint32_t index = it->index();
+

[Igor Sheludko, 2015/06/12 10:05:25]

Spurious change.

     v8::IndexedPropertyDeleterCallback deleter =
         v8::ToCData<v8::IndexedPropertyDeleterCallback>(interceptor->deleter());
     LOG(isolate,
         ApiIndexedPropertyAccess("interceptor-indexed-delete", *holder, index));
     result = args.Call(deleter, index);
   } else if (it->name()->IsSymbol() && !interceptor->can_intercept_symbols()) {
     return MaybeHandle<Object>();
   } else {
     Handle<Name> name = it->name();
     v8::GenericNamedPropertyDeleterCallback deleter =
@@ skipping 11541 matching lines @@
                                             Handle<Object> new_value) {
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 }  // namespace internal
 }  // namespace v8