[es6] silence access-check failure for well-known symbol properties

src/runtime/runtime-array.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/elements.h"
 #include "src/messages.h"
 #include "src/runtime/runtime-utils.h"
@@ skipping 714 matching lines @@
   return true;
 }
 
 
 static bool IsConcatSpreadable(Isolate* isolate, Handle<Object> obj) {
   HandleScope handle_scope(isolate);
   if (!obj->IsSpecObject()) return false;
   if (FLAG_harmony_concat_spreadable) {
     Handle<Symbol> key(isolate->factory()->is_concat_spreadable_symbol());
     Handle<Object> value;
-    MaybeHandle<Object> maybeValue =
-        i::Runtime::GetObjectProperty(isolate, obj, key);
+    MaybeHandle<Object> maybeValue = i::Object::GetPropertyOrFallbackValue(
+        obj, key, Handle<Object>::cast(isolate->factory()->undefined_value()));
     if (maybeValue.ToHandle(&value)) {
       if (!value->IsUndefined()) {
         return value->BooleanValue();
       }
     }
   }
   return obj->IsJSArray();
 }
 
 
@@ skipping 573 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_FastOneByteArrayJoin) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);
   // Returning undefined means that this fast path fails and one has to resort
   // to a slow path.
   return isolate->heap()->undefined_value();
 }
 }  // namespace internal
 }  // namespace v8