Support CreateDataProperty on JSObject in the runtime

src/objects.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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1846 matching lines @@
       ExecutableAccessorInfoHandling handling = DEFAULT_HANDLING);
 
   // Equivalent to one of the above depending on whether |name| can be converted
   // to an array index.
   MUST_USE_RESULT static MaybeHandle<Object>
   DefinePropertyOrElementIgnoreAttributes(
       Handle<JSObject> object, Handle<Name> name, Handle<Object> value,
       PropertyAttributes attributes = NONE,
       ExecutableAccessorInfoHandling handling = DEFAULT_HANDLING);
 
+  // Adds or reconfigures a property to attributes NONE. It will fail when it
+  // cannot.
+  MUST_USE_RESULT static Maybe<bool> CreateDataProperty(LookupIterator* it,
+                                                        Handle<Object> value);
+
   static void AddProperty(Handle<JSObject> object, Handle<Name> name,
                           Handle<Object> value, PropertyAttributes attributes);
 
   MUST_USE_RESULT static MaybeHandle<Object> AddDataElement(
       Handle<JSObject> receiver, uint32_t index, Handle<Object> value,
       PropertyAttributes attributes);
 
   // Extend the receiver with a single fast property appeared first in the
   // passed map. This also extends the property backing store if necessary.
   static void AllocateStorageForMap(Handle<JSObject> object, Handle<Map> map);
@@ skipping 8973 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_